SOURCE: wont stay on
IF there is no display even with a flashlight, the P/S board is malfunctioning. Bad capacitors or LCD driver board circuit. Mine did this and it was bad caps, 4 of 8 were bad and a burned out chip on the P/S board.
SOURCE: Same Insignia problem but still not working
Check if there is back light on or not?
If back light is on means this unit is having problem with panel (deffective.).
If there is no back light change main baord.
Good luck
Dals123
SOURCE: BenQ FP51g LCD monitor
Dear Friend:
There is a Switch transistor to power on -off the hi voltaje for lights. Check 15V from power source go to this transistor colector, Using soldering Iron, make a juntion between colector and emiter, to short 15V to Hi voltaje power. I´m fixing 10 monitor the same trouble. I will remove a liter transistor.
Late I will post here the driver transistor number, and the replace number transistor I will use.
Pictures , etc. Best Regard
SOURCE: just power led still on, but no display at all. I ...
Try these service manuals: http://elektrotanya.com/?q=showresult&megnev=PHILIPS&megnev2=190&kategoria=&kat2=all
You can have bad inverter transformers, or bad lamp assemblies due to poor solder works.
http://s807.photobucket.com/home/budm/allalbums
http://en.wikipedia.org/wiki/Capacitor_plague
Send me pictures of the board so I can guide you.
[email protected]
SOURCE: 50 " Phillips Plasma tv. Screen is black, blinking red light.
Sounds more like blown/exploding capacitors on the PSB-Power Supply board. No OSD-on screen display a blinking led or chatter/relay clikcing at startup is the tv going into fault protection and bypassing the startup pins. The YSUS-Main controls the pic which is attached to 2 buffer boards the YBU-upper YBL-Lower. They control the upper and lower portion of the OSD and the YSUS controls both of them. Since you're getting No OSD you need to check for blown caps on the PSB first. Unplugging the set resets the error again. So you start all over again.
Best Rgards and Semper Fi
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Thx for answer. Are tcon and main board same?
They may be separate but sometimes the two may be combined on one board.
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