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monitor repair

S

sitka

Senior member
I've seen this a couple times, The monitor gets a kind of yellow green glow. I think it is the blue gun that quits putting out.
because there is no blue in the OSD. Nnow the monitor would do this intermittent for years. but usually a giggle of the cord would fix it.
Also one time when a monitor with similar symptoms was taken in the guy said just needed a new VGA cable.
So I took the case off(carefull all the time) and looked at the external surface mount vga din plug and the solder joints were shot so I re flowed them but it didn't help. I'm no tech by any means. I was wondering if anyone with relevant experience would have a suggestion.
This whole situation and solution would only have relavence if it was one of those things that go like this .....80% of the time it is the solder break at the blue gun mosfet caused by thermal cycling.... there are lots of examples of things similar to this so just askin if this is one of them.

Thanks and HNY
s
 
In my experience if wiggling the VGA cable causes either a problem or a fix then 80% of the time it's the video card that is slightly loose or the contacts need a little cleanup with an eraser and then reseat it and make sure attaching the screw doesn't actually pull one end of the card out. (quite common)
The other 20% of the time the cable has a broken wire internally, most often right at the video card end and needs to be replaced. If you are aware of the EXTREME hazards in opening the monitor then you can solder in a new cable assembly for about 10 bucks and see if that fixes the problem.

IF you are not comfortable doing that, then a comp. shop or even a TV repair shop will solder the cable in for a reasonable price as it only takes a few minutes.

Another option is to call around and see who will give you a FREE estimate on the repair.
 
Thanks, monitor is fubared on various machines, cards and cables, thinking the pcb surface mount din vga female (no cable?)may have a bad contact in it, since the mount looks solid after a reflow. I'm going to go get a desoldering pen, and see about a new plug and give that a go. Been wanting a desoldering tool for a while so that is money well spent but if the din plug at the 'Shack' is too much I may have to scrounge one up.
This approach makes sense because of the behaviour history, but I have read that the solder can let go basicaly anywhere in which case this seems like a lost cause, hope I don't screw up the etching upon desoldering. Not because of concern for the monitor just want to know if that was it. Keep reminding myself if the problem is elsewhere don't start digging around until some reading is done on how to decharge the caps.

Thanks again CRV
 
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