Monitor turns on, then off.

DrPepper · Aug 10, 2011, 02:06 PM

Hello everyone I've got a samsung p2450 and when I turn it on, it immediately turns back off. I've replaced what looked like a burnt out resistor but it still turns off very quickly. Doesn't look like there are any damaged caps at all.

brandonwh64 · Aug 10, 2011, 02:13 PM

Sounds like the LCD inverter is damaged. Same thing happened to an old sony laptop and I replaced the inverter and had no further issues

DrPepper · Aug 10, 2011, 02:26 PM

Quote:

Originally Posted by brandonwh64

Sounds like the LCD inverter is damaged. Same thing happened to an old sony laptop and I replaced the inverter and had no further issues

That's what I thought. Where can I get a new one.

MightyMission · Aug 10, 2011, 02:29 PM

ebay isnt a bad choice.
also aswell as looking for the monitor's manufacturer number,look on the circuit board for any identification numbers etc as most manufacturers will use the same parts suppliers,so one board will be available from different source monitors.

DrPepper · Aug 10, 2011, 02:44 PM

Quote:

Originally Posted by MightyMission

ebay isnt a bad choice.
also aswell as looking for the monitor's manufacturer number,look on the circuit board for any identification numbers etc as most manufacturers will use the same parts suppliers,so one board will be available from different source monitors.

Can't find any replacement inverters on the web for it

sparkyar · Aug 10, 2011, 02:52 PM

its the inverter

the same happened to me with 2 lcd, lg 2753 and dell 1708

Goodman · Aug 10, 2011, 03:02 PM

I hope your warranty was over before you open it up to change the resistor...

Samsung & others have a 3 years warranty on their monitors + free shipping

Anyhow i hope you can fix it for cheap , because usually it cost more to fix then to buy a new one but since you're doing yourself you'll save the labor cost

DrPepper · Aug 10, 2011, 03:06 PM

Quote:

Originally Posted by Goodman

I hope your warranty was over before you open it up to change the resistor...

Samsung & others have a 3 years warranty on their monitors + free shipping

Anyhow i hope you can fix it for cheap , because usually it cost more to fix then to buy a new one but since you're doing yourself you'll save the labor cost

It's not my monitor my friend said that the warranty was over so that's why I opened it up.

95Viper · Aug 10, 2011, 03:39 PM

What is the part number of the inverter board?

Should be printed on it like this:

DrPepper · Aug 10, 2011, 09:11 PM

Quote:

Originally Posted by 95Viper

What is the part number of the inverter board?

Should be printed on it like this:
http://www.djhome.net/tips/LIMG4278.JPG

Erm is the inverter the part connected to the actual display or another part that is either the power supply or the board with the display on it.

95Viper · Aug 10, 2011, 09:21 PM

Your board may look something likes these...

Click image for larger version

Name: IMG_1789_800px.jpg
Views: 150
Size: 79.2 KB
ID: 43137

Click image for larger version

Name: PowerSupplyUnits.jpg
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Size: 146.2 KB
ID: 43138

Edit: Sorry was having some technical problems.

Yes, it is part of the power supply board.
Thanks, dr emulator (madmax)...

dr emulator (madmax) · Aug 10, 2011, 09:28 PM

Quote:

Originally Posted by DrPepper

Erm is the inverter the part connected to the actual display or another part that is either the power supply or the board with the display on it.

it more than likely will be part of the powersupply ,in my dealings with monitors they usually are ,laptops however usually have a seperate inveter , i have seen some with replaceable mosfet chips, but alot are surface mounted ,which would be a royal pain in the ass to remove
hopefully they won't be

DrPepper · Aug 10, 2011, 09:33 PM

Quote:

Originally Posted by 95Viper

Your board may look something likes these...

Attachment 43137

Attachment 43138

Pictures aren't appearing. I'l get detailed pictures in the morning.

Quote:

Originally Posted by dr emulator (madmax)

it more than likely will be part of the powersupply ,in my dealings with monitors they usually are ,laptops however usually have a seperate inveter , i have seen some with replaceable mosfet chips, but alot are surface mounted ,which would be a royal pain in the ass to remove
hopefully they won't be

The power supply has a massive burn mark on the resistor that I replaced which should be repaired now.

dr emulator (madmax) · Aug 10, 2011, 09:36 PM

it'll be conected to the inverter by the pink and white partially sleaved wires (usuall covered by some silver coloured metallic tape)

dr emulator (madmax) · Aug 10, 2011, 09:42 PM

Quote:

Originally Posted by DrPepper

Pictures aren't appearing. I'l get detailed pictures in the morning.

The power supply has a massive burn mark on the resistor that I replaced which should be repaired now.

more than likely one or more of the transistors have blown or shorted out (you'll have to get your multimeter out ,but wait for the mains capacitor to disharge or you''ll be frying tonight

)

take pics of the board

DrPepper · Aug 10, 2011, 09:49 PM

Quote:

Originally Posted by dr emulator (madmax)

more than likely one or more of the transistors have blown or shorted out (you'll have to get your multimeter out ,but wait for the mains capacitor to disharge or you''ll be frying tonight

)

take pics of the board

I'l remember. I thought that board was the power supply since the power cable went to it. I'l get pictures and get it sorted out, got a lot on my plate tonight.

dr emulator (madmax) · Aug 10, 2011, 10:06 PM

well we can guide you to the part that might have shorted out (with enough pics), but then it's upto you to test it and what not

ye the inverter is usually intergrated onto the psu board ,not to complicated a circuit, but as i've said to others the parts might be hard to get a hold of

MightyMission · Aug 10, 2011, 10:33 PM

In all honesty,a photo of the OP's board should allow us collectively to source a replacement,as long as the board model number can be ID'd.
I'm looking at a schematic of the pcb now but navigating it is painfully difficult due to only having a half gig of ram in my pc

DrPepper · Aug 10, 2011, 10:59 PM

Here are the pictures. Please excuse my shitty soldering I have insanely shaky hands.

Urlyin · Aug 11, 2011, 03:32 PM

Check this out here

Also here

DrPepper · Aug 11, 2011, 11:59 PM

Quote:

Originally Posted by Urlyin

Check this out here

Also here

Went ahead and bought the part

Thanks very much everyone.

dr emulator (madmax) · Aug 13, 2011, 06:32 AM

Quote:

Originally Posted by MightyMission

In all honesty,a photo of the OP's board should allow us collectively to source a replacement,as long as the board model number can be ID'd.
I'm looking at a schematic of the pcb now but navigating it is painfully difficult due to only having a half gig of ram in my pc

hm this kinda sounds familiar but sauce

seriously though i'd like to see the diagram (if you've got the exact one

)

@the Dr, label your cables first before dismantling it

DrPepper · Aug 13, 2011, 12:12 PM

Quote:

Originally Posted by dr emulator (madmax)

hm this kinda sounds familiar but sauce

seriously though i'd like to see the diagram (if you've got the exact one

)

@the Dr, label your cables first before dismantling it

I can remember it all off by heart now

qubit · Aug 13, 2011, 12:46 PM

I was gonna say that this all sounds like an awful lot of bother and possible expense for an old monitor and recommend just buying a new one, which is likely to have better specs anyway.

However, as you've already bought the part, I hope it fixes it for you.

DrPepper · Aug 13, 2011, 12:47 PM

Quote:

Originally Posted by qubit

I was gonna say that this all sounds like an awful lot of bother and possible expense for an old monitor and recommend just buying a new one, which is likely to have better specs anyway.

However, as you've already bought the part, I hope it fixes it for you.

It's only a year old though.

Aug 10, 2011, 02:06 PM	#1
DrPepper The Doctor is in the house Join Date: Jan 2008 Location: Scotland (It rains alot) Posts: 6,423 (3.29/day) Thanks: 977 Thanked 828 Times in 667 Posts System Specs	Monitor turns on, then off. Hello everyone I've got a samsung p2450 and when I turn it on, it immediately turns back off. I've replaced what looked like a burnt out resistor but it still turns off very quickly. Doesn't look like there are any damaged caps at all.

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Aug 10, 2011, 02:13 PM	#2
brandonwh64 Addicted to Bacon and StarCrunches!!! Join Date: Sep 2009 Location: Chatsworth, GA Posts: 13,563 (10.02/day) Thanks: 2,146 Thanked 5,341 Times in 3,696 Posts System Specs	Sounds like the LCD inverter is damaged. Same thing happened to an old sony laptop and I replaced the inverter and had no further issues __________________ Cruncher's: All GPU's GPU's: 7970 3GB Unlocked = 8 Threads 5770 1GB OCed = 2 Threads

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Aug 10, 2011, 02:29 PM	#4
MightyMission Join Date: Mar 2011 Posts: 227 (0.29/day) Thanks: 127 Thanked 119 Times in 110 Posts System Specs	ebay isnt a bad choice. also aswell as looking for the monitor's manufacturer number,look on the circuit board for any identification numbers etc as most manufacturers will use the same parts suppliers,so one board will be available from different source monitors.

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Aug 10, 2011, 02:52 PM	#6
sparkyar Join Date: Dec 2009 Posts: 76 (0.06/day) Thanks: 1 Thanked 15 Times in 10 Posts	its the inverter the same happened to me with 2 lcd, lg 2753 and dell 1708

Aug 10, 2011, 03:02 PM	#7
Goodman Join Date: Jun 2009 Location: Canada/Québec/Montreal Posts: 1,506 (1.05/day) Thanks: 253 Thanked 328 Times in 247 Posts System Specs	I hope your warranty was over before you open it up to change the resistor... Samsung & others have a 3 years warranty on their monitors + free shipping Anyhow i hope you can fix it for cheap , because usually it cost more to fix then to buy a new one but since you're doing yourself you'll save the labor cost

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Aug 10, 2011, 03:39 PM	#9
95Viper Join Date: Oct 2008 Location: στο άλφα έως ωμέγα Posts: 3,839 (2.28/day) Thanks: 2,032 Thanked 1,416 Times in 1,115 Posts System Specs	What is the part number of the inverter board? Should be printed on it like this: __________________ Heatware: 95viper TECHPOWERUP GEAR!

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Aug 10, 2011, 09:21 PM	#11
95Viper Join Date: Oct 2008 Location: στο άλφα έως ωμέγα Posts: 3,839 (2.28/day) Thanks: 2,032 Thanked 1,416 Times in 1,115 Posts System Specs	Your board may look something likes these... Edit: Sorry was having some technical problems. Yes, it is part of the power supply board. Thanks, dr emulator (madmax)... __________________ Heatware: 95viper TECHPOWERUP GEAR! Last edited by 95Viper; Aug 10, 2011 at 09:34 PM.

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Aug 10, 2011, 09:36 PM	#14
dr emulator (madmax) Join Date: May 2009 Location: the uk that's all you need to know ;) Posts: 1,107 (0.75/day) Thanks: 757 Thanked 181 Times in 169 Posts System Specs	it'll be conected to the inverter by the pink and white partially sleaved wires (usuall covered by some silver coloured metallic tape) __________________ advice on what type of memory that's needed for the GIGABYTE X58A-UD7 Thanks to stefanels for the signature post pics of your bizaare mods - GPU-Z v0.6.6 is out

Aug 10, 2011, 10:06 PM	#17
dr emulator (madmax) Join Date: May 2009 Location: the uk that's all you need to know ;) Posts: 1,107 (0.75/day) Thanks: 757 Thanked 181 Times in 169 Posts System Specs	well we can guide you to the part that might have shorted out (with enough pics), but then it's upto you to test it and what not ye the inverter is usually intergrated onto the psu board ,not to complicated a circuit, but as i've said to others the parts might be hard to get a hold of __________________ advice on what type of memory that's needed for the GIGABYTE X58A-UD7 Thanks to stefanels for the signature post pics of your bizaare mods - GPU-Z v0.6.6 is out

Aug 10, 2011, 10:33 PM	#18
MightyMission Join Date: Mar 2011 Posts: 227 (0.29/day) Thanks: 127 Thanked 119 Times in 110 Posts System Specs	In all honesty,a photo of the OP's board should allow us collectively to source a replacement,as long as the board model number can be ID'd. I'm looking at a schematic of the pcb now but navigating it is painfully difficult due to only having a half gig of ram in my pc Last edited by MightyMission; Aug 10, 2011 at 10:43 PM.

Aug 10, 2011, 10:59 PM	#19
DrPepper The Doctor is in the house Join Date: Jan 2008 Location: Scotland (It rains alot) Posts: 6,423 (3.29/day) Thanks: 977 Thanked 828 Times in 667 Posts System Specs	Here are the pictures. Please excuse my shitty soldering I have insanely shaky hands.

Aug 11, 2011, 03:32 PM	#20
Urlyin Senior Moderator Join Date: Aug 2004 Posts: 2,133 (0.67/day) Thanks: 61 Thanked 124 Times in 77 Posts	Check this out here Also here __________________ Open your mind and shut your mouth

Aug 13, 2011, 12:46 PM	#24
qubit Overclocked quantum bit Join Date: Dec 2007 Location: Quantumville UK Posts: 8,648 (4.34/day) Thanks: 4,178 Thanked 3,303 Times in 1,943 Posts System Specs	I was gonna say that this all sounds like an awful lot of bother and possible expense for an old monitor and recommend just buying a new one, which is likely to have better specs anyway. However, as you've already bought the part, I hope it fixes it for you. __________________ Siggie in the post.

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