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Monitor turns on, then off.

DrPepper

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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

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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

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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.
 
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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

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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 :(
 
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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

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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

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What is the part number of the inverter board?

Should be printed on it like this:
 

DrPepper

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95Viper

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Your board may look something likes these...

IMG_1789_800px.jpg

PowerSupplyUnits.jpg

Edit: Sorry was having some technical problems.:)

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

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Your board may look something likes these...

View attachment 43137

View attachment 43138

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

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

take pics of the board
 

DrPepper

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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 :laugh:)

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.
 
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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 :(
 
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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 :roll:
 
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DrPepper

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






 

DrPepper

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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 :roll:

hm this kinda sounds familiar but sauce :laugh::D

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

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hm this kinda sounds familiar but sauce :laugh::D

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 :)
 

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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

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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.
 
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