LG Monitor White Screen

yincloud · Feb 12, 2013, 11:48 AM

I have a LG Flatron E2340T with a white Screen.
When I turn it on it flashes once and then shows white screen, sometimes monitor does work, but thats random - sometimes when I turn it on, sometimes when its on for a while.
My PC detects that monitor when I plug it.

yincloud · Feb 13, 2013, 02:56 PM

Bump

Jetster · Feb 13, 2013, 03:45 PM

fixing an LCD screen is not an exact science. Check for leaky or bloated caps or obvious stuff overheating. You could try a new Decon board or main board but there is no guarantee. Obviously the back light works

I have the W2340V

drdeathx · Feb 13, 2013, 03:51 PM

Post your system specs. Could be a GPU problem. Try the monitor on another computer.

yincloud · Feb 14, 2013, 06:16 PM

Quote:

Originally Posted by drdeathx

Post your system specs. Could be a GPU problem. Try the monitor on another computer.

Its not a PC related problem, since the monitor worked from time to time and when I unplug DVI cable its still displays white picture, monitor doesnt show that its disconnected.

AsRock · Feb 14, 2013, 06:27 PM

I thought LG LCD's were warranted for 3 years ?.. Unless it is passed that time just thought i say..

And still should try the LCD on another system.

yincloud · Feb 14, 2013, 06:38 PM

Quote:

Originally Posted by AsRock

I thought LG LCD's were warranted for 3 years ?.. Unless it is passed that time just thought i say..

And still should try the LCD on another system.

I have tried monitor on different systems before and result is the same.

Frick · Feb 14, 2013, 06:39 PM

Then it's time to open it up and see if you can find some damage. As Jetser said: "Check for leaky or bloated caps or obvious stuff overheating."

yincloud · Feb 15, 2013, 07:03 AM

Quote:

Originally Posted by Frick

Then it's time to open it up and see if you can find some damage. As Jetser said: "Check for leaky or bloated caps or obvious stuff overheating."

I would do that but this monitor doesnt have any screws...

SaiZo · Feb 15, 2013, 08:54 AM

Hi, I have the same brand, but different model (E2250T). If I recall correctly, you have to pry open the sides. Just be careful, because without the proper tools, it's easy to "slip" and damage the components on the inside.

Do not ever use metal objects, such as a screwdriver when trying to pry it open - it can damage the entire screen if it slips!

My stand is different also, so I can't verify if your screen shall be opened up the same way (I have a front bezel on the screen that needs to be removed first).

If you search the net (Google?), I think you might even find your own service manual, but be careful, many crap links can be found leading to a 'dead end'.

Also, how is the inverter for the screen? I had to get a new one, since the first one was broken - I bought mine second hand however.

I'll try and see if I can find my Service Manual again, but I think your screen opens up the same way as mine..

RCoon · Feb 15, 2013, 08:57 AM

The last time this happened at work, a white screen was caused by a member of staff putting a van der graaf generator next to the pc and monitor. Then again, i assume you dont have one of those lying around?

Jetster · Feb 15, 2013, 08:58 AM

O it comes apart. Take a screwdriver and put tape over the end and try to work your way around the bezel. Thats if your dont see any plugs where screws may be

yincloud · Feb 15, 2013, 07:12 PM

Quote:

Originally Posted by SaiZo

Hi, I have the same brand, but different model (E2250T). If I recall correctly, you have to pry open the sides. Just be careful, because without the proper tools, it's easy to "slip" and damage the components on the inside.

Do not ever use metal objects, such as a screwdriver when trying to pry it open - it can damage the entire screen if it slips!

My stand is different also, so I can't verify if your screen shall be opened up the same way (I have a front bezel on the screen that needs to be removed first).

If you search the net (Google?), I think you might even find your own service manual, but be careful, many crap links can be found leading to a 'dead end'.

Also, how is the inverter for the screen? I had to get a new one, since the first one was broken - I bought mine second hand however.

I'll try and see if I can find my Service Manual again, but I think your screen opens up the same way as mine..

What can I even use to pry open my monitor other than a screw driver?

Quote:

Originally Posted by RCoon

The last time this happened at work, a white screen was caused by a member of staff putting a van der graaf generator next to the pc and monitor. Then again, i assume you dont have one of those lying around?

No, I don't. The first time I got a white screen was after it was turned off for about ~8 hours, It started to work again by pressing down the side of the monitor.

EDIT: Soo just now after pressing down random spots again on my monitor it started to work again, but im sure its temporary since I got the monitor working like this few times already.

jaggerwild · Feb 15, 2013, 07:57 PM

Open the monitor up after unplugging the power cord, you can use your fingernails if there not naweded off.
after you have opened it clean any dust out of it, re seat all ribbon cables. if you can see the inverter board and PSU check the caps.carefully for leakage. you may need to use a manifying glass to examine the top and bottum of the caps. After re seating all connectors, with out closing it up, plug it in see if its working now. Make sure NOT to touch the boards inside the monitor while it has power.
if it works close it up. if not you will need to replace something inside of it, or dump it on Flee Bay and get a new one........
goOd luck!!!

McSteel · Feb 15, 2013, 08:04 PM

White screen = TFT matrix in off (default) position + pure backlight on full blast. This can only mean one thing, since your PC detects (via plug n play) your monitor: your flat/ribbon cable, going from the MCU board to the panel has come out of the connector. Once you properly re-seat it, your monitor should spring back to life. There is a minor chance that something else is wrong in addition to this, but try reconnecting the ribbon cable first, then if it doesn't help, post pictures of the inverter/power board and the MCU board, so that we may help further.

itsakjt · Feb 17, 2013, 05:56 AM

^+1 Above. Also, open the monitor chassis with a credit card like thing. That won't cause any damage.

SaiZo · Feb 18, 2013, 03:24 PM

Quote:

Originally Posted by yincloud

What can I even use to pry open my monitor other than a screw driver?

No, I don't. The first time I got a white screen was after it was turned off for about ~8 hours, It started to work again by pressing down the side of the monitor.

EDIT: Soo just now after pressing down random spots again on my monitor it started to work again, but im sure its temporary since I got the monitor working like this few times already.

I used a plectrum actually.. But as an other member said, even a credit card or similar might work. Mine was not glued, had a double adhesive tape. However, when you start to get some sides up, perhaps you could use, as said by another forum member, a screwdriver with tape covering the edge.

Just be careful.

Geofrancis · Feb 19, 2013, 10:51 AM

I have seen the same issue in a few laptops and it was the LCD panel had failed. But check all the capacitors and connections first. If that doesnt work you must be able to get a cheap replacement panel off of ebay once you get the model number of the panel.

yincloud · Feb 23, 2013, 11:57 AM

Real quality, looks like someone has opened it before it was bought from the store...

itsakjt · Feb 23, 2013, 12:24 PM

Quote:

Originally Posted by yincloud

Real quality, looks like someone has opened it before it was bought from the store...http://i.imgur.com/tMwfo7Y.jpg

Black tape! I see. Check the connections.

yincloud · Feb 23, 2013, 12:35 PM

Quote:

Originally Posted by itsakjt

Black tape! I see. Check the connections.

The ones I can see are connected.

itsakjt · Feb 23, 2013, 02:58 PM

Just to double check, open all the connectors, clean the PCB with Iso-propyl alcohol and reconnect all cables.

yincloud · Feb 23, 2013, 06:32 PM

Yeah, it looks like the the white thin cable was disconnected, I couldn't notice it at first cause it was covered by that duck tape and I was hesitant to remove the tape.

itsakjt · Feb 24, 2013, 05:34 AM

All the best then.

de.das.dude · Feb 24, 2013, 06:23 AM

check the circuitry connected to the LCD matrix. something is wrong there. might be loose connections since you say that its working once or twice.

black tape doesnt necessarily mean someone had opened it before, many companies use tape and glue nowadays to keep assembling costs down and assembling time down.

those tapes are specially coated with carbon/something to form a sort of seal from electric fields. so its a good idea to keep the tapes and reuse them again.

Feb 12, 2013, 11:48 AM	#1
yincloud Join Date: Feb 2013 Posts: 9 (0.09/day) Thanks: 0 Thanked 0 Times in 0 Posts	LG Monitor White Screen I have a LG Flatron E2340T with a white Screen. When I turn it on it flashes once and then shows white screen, sometimes monitor does work, but thats random - sometimes when I turn it on, sometimes when its on for a while. My PC detects that monitor when I plug it.

System Name:	Delta // HTPC
Processor:	Intel i7 3770K // Intel i3 550 3.2Ghz
Motherboard:	ASRock Z77 Extreme6 // Gigabyte GA-H55M-S2H Socket 1156
Cooling:	Corsair H100 // SILVERSTONE NT07-1156 90mm
Memory:	Corsair Vengeance 1866 16gb //Corsair DDR3 1600 4 Gb
Video Card:	HIS 7950 3 Gb //Sapphire 6670 1 Gb
Hard Disk:	Samsung 840 250 SSD, WD Caviar Blue 500// Corsair M4 64 Gb Solid State, SAMSUNG F4 2 Tb, WD 1 Tb
Optical Drive:	LG DVDR 24X // Lite on DVDR 24X
CRT/LCD Model:	HP 23xi IPS 1080p" // 50" Samsung Plasma 720p
Case:	Corsair Obsidian Series 550D // Silverstone Granada GD05
Sound Card:	ASUS Xonar DS // HDMI Bit Stream to Yamaha RX V571
PSU:	Seagate M12II 750 // Corsair CX 430
Software:	Windows 7 64bit // Windows 7 64bit with XBMC Eden
Benchmarks:	I scored P9327 in 3DMark 11

System Name:	Halloween Boo!
Processor:	Intel Core i7 3770K
Motherboard:	Gigabyte Z77-Up7
Cooling:	Custom Water/ Thermalchill TA 120.3/ Swiftech Apogeee XT/ MCP655/ Swiftech M icrores/ XSPC RX 240
Memory:	16G G.Skill trident 2400MHz
Video Card:	3 x Radeon 7970
Hard Disk:	OCZ Revo Drive 240G
Optical Drive:	Asus
CRT/LCD Model:	24 inch Viewsonic
Case:	Phobia WayCoolIt Test Bench
PSU:	Nexus 1100 watt

System Name:	weeeeeeeeeeeeeeeeeee
Processor:	i5 2500k \ i7 3770k
Motherboard:	ASRock Z68 Extreme3 Gen3 \ ASRock Z77 Extreme 4
Cooling:	Gemini II S524 \ XIGMATEK Gaia SD1283 with Couger 1500 RPM fans\ ZM-MFC2
Memory:	Samsung 1600 16GB \ Samsung 1600 16GB
Video Card:	XFX HD6770 \ XFX 6970 w/Prolima MK-13 ( With modded 5870 VRM hrstsink )
Hard Disk:	2x intel ssd x25 G2 80GB \ OCZ Solid 3+2 Corsair Force GT's 120GB (Use HDD's for backups only
Optical Drive:	LiteOn DVD 163 \ TEAC exturnal DVD drive
CRT/LCD Model:	Samsung 204B 20.1inch ( Native 12x16 ) \ Toshiba 40" HDTV ( Native 1920x1080 )
Case:	ARK Black HTPC 400BA \ None
Sound Card:	Though video card HDMI ONKYO TX-SR608 +TANNOY MERCURY F4+ Polk Audio RTI4+Polk Audio PSW505
PSU:	CoolMax CXI-600B\ PC Power & Cooling Silencer 750 Quad
Software:	Windows Vista Ultimate 64Bit \Win 7
Benchmarks:	Track IR 4 Razer Blackwidow Ultimate ( rma'ed trice and same issue's ) Steelseries XAI

Feb 14, 2013, 06:39 PM	#8
Frick Fishfaced Nincompoop Join Date: Feb 2006 Location: Sweden Posts: 7,898 (2.99/day) Thanks: 1,076 Thanked 1,449 Times in 1,155 Posts System Specs	Then it's time to open it up and see if you can find some damage. As Jetser said: "Check for leaky or bloated caps or obvious stuff overheating." __________________ Typemachine: Acer Aspire One D250 \| Atom N280 1.6 Ghz \| 1GB DDR2 \| 160GB SATA \| 10.1' 1024 x 600 \| Lubuntu 12.10 Oldbox: HP D530 \| Pentium 4 2.8 Ghz \| 1GB DDR \| 40GB \| Windows XP "The 'gentle biker' look is overdone. I'm going for 'psycho hillbilly.' "

Feb 13, 2013, 02:56 PM	#2
yincloud Join Date: Feb 2013 Posts: 9 (0.09/day) Thanks: 0 Thanked 0 Times in 0 Posts	Bump

Feb 13, 2013, 03:45 PM	#3
Jetster Join Date: Jan 2010 Location: Oregon Posts: 2,880 (2.35/day) Thanks: 941 Thanked 866 Times in 633 Posts System Specs	fixing an LCD screen is not an exact science. Check for leaky or bloated caps or obvious stuff overheating. You could try a new Decon board or main board but there is no guarantee. Obviously the back light works I have the W2340V

Feb 13, 2013, 03:51 PM	#4
drdeathx Join Date: May 2009 Location: Chicago burbs Posts: 1,514 (1.03/day) Thanks: 39 Thanked 335 Times in 275 Posts System Specs	Post your system specs. Could be a GPU problem. Try the monitor on another computer.

Feb 14, 2013, 06:27 PM	#6
AsRock TPU addict Join Date: Jun 2007 Location: US\ Uk Born Posts: 8,796 (4.07/day) Thanks: 1,677 Thanked 1,348 Times in 1,170 Posts System Specs	I thought LG LCD's were warranted for 3 years ?.. Unless it is passed that time just thought i say.. And still should try the LCD on another system.

System Name:	Ongoing scavanging
Processor:	Sempron 140
Motherboard:	MSI 760GM-P23 (FX)
Cooling:	Somesuch
Memory:	2GB DDR3
Video Card:	Something
Hard Disk:	160GB + 1TB
Optical Drive:	Yes
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Case:	Wossname
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PSU:	FSP400-60APN
Software:	Windows 7 Pro

Feb 15, 2013, 08:54 AM	#10
SaiZo Join Date: Apr 2011 Location: Hesperus IV Posts: 369 (0.48/day) Thanks: 561 Thanked 42 Times in 34 Posts System Specs	Hi, I have the same brand, but different model (E2250T). If I recall correctly, you have to pry open the sides. Just be careful, because without the proper tools, it's easy to "slip" and damage the components on the inside. Do not ever use metal objects, such as a screwdriver when trying to pry it open - it can damage the entire screen if it slips! My stand is different also, so I can't verify if your screen shall be opened up the same way (I have a front bezel on the screen that needs to be removed first). If you search the net (Google?), I think you might even find your own service manual, but be careful, many crap links can be found leading to a 'dead end'. Also, how is the inverter for the screen? I had to get a new one, since the first one was broken - I bought mine second hand however. I'll try and see if I can find my Service Manual again, but I think your screen opens up the same way as mine..

System Name:	Oh Crap..
Processor:	AMD Phenom II X6, 1055T
Motherboard:	MSI (cant remember model..)
Cooling:	Antec Kühler + extra Antec fan (push/pull)
Memory:	16Gb (2 x 8Gb)
Video Card:	nVidia GTS 250
Hard Disk:	Samsung 1TB, 320 Seagate, 250 Samsung
Optical Drive:	Labelflash (OEM DVD burner - salvaged)
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Case:	ANTEC Sonata III 500 (found/salvaged)
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PSU:	Something that works strange enough..
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Feb 15, 2013, 08:57 AM	#11
RCoon Join Date: Apr 2012 Location: Grantham, Lincolnshire, UK Posts: 1,254 (3.13/day) Thanks: 116 Thanked 426 Times in 304 Posts System Specs	The last time this happened at work, a white screen was caused by a member of staff putting a van der graaf generator next to the pc and monitor. Then again, i assume you dont have one of those lying around? __________________ "So many times I wanted to move about (make poop but can't leave the game because it's online)" - Underworld

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Feb 15, 2013, 08:58 AM	#12
Jetster Join Date: Jan 2010 Location: Oregon Posts: 2,880 (2.35/day) Thanks: 941 Thanked 866 Times in 633 Posts System Specs	O it comes apart. Take a screwdriver and put tape over the end and try to work your way around the bezel. Thats if your dont see any plugs where screws may be

Feb 15, 2013, 07:57 PM	#14
jaggerwild Join Date: Oct 2008 Location: Reality Posts: 113 (0.07/day) Thanks: 10 Thanked 11 Times in 11 Posts System Specs	Open the monitor up after unplugging the power cord, you can use your fingernails if there not naweded off. after you have opened it clean any dust out of it, re seat all ribbon cables. if you can see the inverter board and PSU check the caps.carefully for leakage. you may need to use a manifying glass to examine the top and bottum of the caps. After re seating all connectors, with out closing it up, plug it in see if its working now. Make sure NOT to touch the boards inside the monitor while it has power. if it works close it up. if not you will need to replace something inside of it, or dump it on Flee Bay and get a new one........ goOd luck!!!

System Name:	"COMPUTER"
Processor:	3930K
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Cooling:	Water
Memory:	Gskill Ripjaws 2400
Video Card:	Many different GPU'S
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Sound Card:	onboard
PSU:	Corsair AX1200
Software:	Windows7 OEM 64Bit
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Feb 15, 2013, 08:04 PM	#15
McSteel Join Date: Nov 2012 Location: North Disturbia Posts: 262 (1.41/day) Thanks: 5 Thanked 122 Times in 87 Posts System Specs	White screen = TFT matrix in off (default) position + pure backlight on full blast. This can only mean one thing, since your PC detects (via plug n play) your monitor: your flat/ribbon cable, going from the MCU board to the panel has come out of the connector. Once you properly re-seat it, your monitor should spring back to life. There is a minor chance that something else is wrong in addition to this, but try reconnecting the ribbon cable first, then if it doesn't help, post pictures of the inverter/power board and the MCU board, so that we may help further. __________________ Careful what you wish for... You just might get it.

System Name:	Chaos
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Hard Disk:	256GB Samsung 840 Pro SSD + 320 GB Samsung SP F3 + 320 GB WD Blue + 200 GB Hitachi DeskStar 7200
Optical Drive:	None
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Sound Card:	Onboard
PSU:	Seasonic SS-380GB

Feb 17, 2013, 05:56 AM	#16
itsakjt Join Date: Oct 2010 Location: Kolkata Posts: 420 (0.44/day) Thanks: 265 Thanked 104 Times in 74 Posts System Specs	^+1 Above. Also, open the monitor chassis with a credit card like thing. That won't cause any damage.

System Name:	Phenom
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Memory:	2*2 GB Kingston DDR3 1333 MHz RAM running at 1752 MHz 8-9-8-24
Video Card:	Sapphire Radeon HD6770 1GB DDR5 copper base cooler-core 970MHz and mem 1295MHz
Hard Disk:	Western Digital Caviar Green 1TB SATA II-WD10EARS-22Y5B1, Seagate 80 GB SATA I-ST380817AS
Optical Drive:	LG GH22N-S50
CRT/LCD Model:	LG-E2042TC 20" wide screen LCD-1600*900
Case:	I-Ball Grabit(somewhat uncommon but average case)
Sound Card:	Realtek ALC892 8 channel audio onboard
PSU:	Zebronics Platinum series 600W Power Supply
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Feb 19, 2013, 10:51 AM	#18
Geofrancis Join Date: Mar 2009 Location: SCOTLAND! Posts: 919 (0.60/day) Thanks: 91 Thanked 137 Times in 106 Posts System Specs	I have seen the same issue in a few laptops and it was the LCD panel had failed. But check all the capacitors and connections first. If that doesnt work you must be able to get a cheap replacement panel off of ebay once you get the model number of the panel. __________________ machine XI Phenom II 965 Black @3.8ghz, 8Gb XMS3 1600, Asus M4A88TD-M EVO/USB3, HD5970, 128gb sandisk SSD, mcubed t-balancer HP EliteBook 2530p SL9400 Core 2 Duo ULV @ 0.9v, 4Gb ddr2, 80Gb Intel X-18m G2, 64Gb express card SSD, Ubiquiti SR71-E 400mw wifi, 21mb HSPA+ ESXI Server Phenom II 1155T, MSI 890FXA-GD70, 12Gb ddr3, IBM M1015 sas, Dell sas 6i, 10 drive 8tb UNRAID array. Old Builds :watercooled matx rig\|Water Cooled ITX rig \|EeePC 701 7" netbook \| ITX Gaming raid build

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Case:	micro atx case
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PSU:	750W
Software:	Windows 7 x64 Ultimate

Feb 23, 2013, 11:57 AM	#19
yincloud Join Date: Feb 2013 Posts: 9 (0.09/day) Thanks: 0 Thanked 0 Times in 0 Posts	Real quality, looks like someone has opened it before it was bought from the store...

Feb 23, 2013, 02:58 PM	#22
itsakjt Join Date: Oct 2010 Location: Kolkata Posts: 420 (0.44/day) Thanks: 265 Thanked 104 Times in 74 Posts System Specs	Just to double check, open all the connectors, clean the PCB with Iso-propyl alcohol and reconnect all cables.

Feb 23, 2013, 06:32 PM	#23
yincloud Join Date: Feb 2013 Posts: 9 (0.09/day) Thanks: 0 Thanked 0 Times in 0 Posts	Yeah, it looks like the the white thin cable was disconnected, I couldn't notice it at first cause it was covered by that duck tape and I was hesitant to remove the tape.

Feb 24, 2013, 05:34 AM	#24
itsakjt Join Date: Oct 2010 Location: Kolkata Posts: 420 (0.44/day) Thanks: 265 Thanked 104 Times in 74 Posts System Specs	All the best then.

Feb 24, 2013, 06:23 AM	#25
de.das.dude Join Date: Jun 2010 Location: Wild Wild East Posts: 4,585 (4.26/day) Thanks: 2,337 Thanked 1,342 Times in 919 Posts System Specs	check the circuitry connected to the LCD matrix. something is wrong there. might be loose connections since you say that its working once or twice. black tape doesnt necessarily mean someone had opened it before, many companies use tape and glue nowadays to keep assembling costs down and assembling time down. those tapes are specially coated with carbon/something to form a sort of seal from electric fields. so its a good idea to keep the tapes and reuse them again. __________________ my wallet isnt hashwell compatiple sad face

System Name:	SuperDuperUberComputer
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Memory:	2x4GB DDR3 Corsair Vengeance 1600MHz CL9
Video Card:	GIGABYTE GTS450 OC2
Hard Disk:	SATA II 80GB Hitachi 7200RPM,W.D 500GB Green \|\| 4GB int + random SD cards
Optical Drive:	ASUS DVD drive
CRT/LCD Model:	Samsung Sync Master 793s CRT\|
Case:	NZXT Guardian 921RB
Sound Card:	Realtek ALC892 with THX True Studio
PSU:	Corsair GS600
Software:	Windows 7 64bit
Benchmarks:	real men dont need to bench :p

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