Question How to repair an old monitor.

[NightHawkRMX]

Hello. I have a Dell 1709Wc monitor.

I was using this monitor for this project

View: https://youtu.be/258C19pwXzo?t=323
and tried to use a molex connector for the monitor. I smelt something bad and the screen freaked out. I dont know how, since i felt sure i connected the board properly.

Now the same thing happens if I power it on. White screen with lines. If i unplug the LCD but leave backlight plugged in the lines goe away.

I believe the control board may have a fried chip. This chip is a 2Mbit Flash chip.https://ww1.microchip.com/downloads/en/DeviceDoc/25080A.pdf
The boards schematic is found here. Not the same monitor, but the service manual for this one has a scematic for the same controller in mine.
http://www.go-gddq.com/upload/2013-03/13032620284041.pdf

Pics of board.

https://imgur.com/e9iAWZr

View: https://imgur.com/e9iAWZr

https://imgur.com/s9U4qCg

View: https://imgur.com/s9U4qCg


Do you think i could replace this chip, or would it need to be programmed? Do you even think that's the issue?

 

[WaltzWorker]

NOTE: That 'burnt' nasty smell you get from burnt electronics can be TOXIC... I do not know the 'levels of toxicity' nor wither or not if it can kill you, or do serious damage... I do know there can be toxic chemicals within that 'smoke'/'smell.'

Well, monitor repair has pretty much gone by the wayside - I don't remember a lot from school having gone into computers... But a co-worker generally replaces caps in the power boards... Back-lighting and that's about it... At first glance I see a couple of discolored areas - the crystal and by the cap at the bottom right. Again - in the old days smelling areas of the board can also localize the area/component... NOT Recommended...
The doc for the chip you list is "SST25LF020A" but there are tonnes of variations so keeping to the exact number given in the manual is a must. At the top of THIS PAGE is the exact one - but see all the variations? Looking at the top of that manual it says: "Not recommended for new designs. Please use SST25LF020B" - the manual also notes "2nd source" meaning that this part did not come from the manufacturer... Albeit if you go to the manufacturers site - each and every iteration of this chip and others notes: "Upload your code to this device for as low as 0.2 " More than likely the 2nd source is the programmer of this chip that has a contract with them... So if you could overcome that hurdle then it's just replacing it. FYI: this is surface mount - albeit earlier version of smt, its still delicate and extremely temp/time sensitive. As for 'could you' - its possible but I've been in this business for 30 years now - I could possibly do it but would not want to do it.