Having problems with your Sylvania CL772B 17" Flat Panel LCD Monitor ?

Back lights go out intermitantly

\015 Someone gave me this monitor to see if I could fix it. I pluged it into my computer for three day without a problem. Today I turned on the computer and the green light on the monitor came on but no picture. I tried unpluging it and then pluging it back in and it came on for a few secconds and went off again. Whyle it was plugged in I took a flash light and shone it against the screen and I was able to just barely able to make out the image of my desktop. So aparently the back lights have gone out but come on again when I plug it back in. What do you suppose the problem is?\015

Answers :

Robert_adams, your problem is not uncommon. How old is or how many in use hours does this monitor have? Is it under warranty? This sounds like bad power supply(SMPS and or Inverter) which are needed to generate an 800-1500v ac to light -up the thin, straight, Cold-Cathode-Fluorescent Tubes used for backlighting the LCD/FPD . If out of warranty Check to see about a swapout program. you send them your's+$50-$90 they send you same model refurbished(new ccf tubes and inverter/smps. or find local guy to do repair. But this one sounds like you could do it all by yourself. If you have a DMM and large magnifying glass, or 10x-30x inspection microscope you might be able to see the bad solder joints on the switch mode power supply and the swollen electrolytic capacitors on the board. look on youtube for videos of lcd monitor disassembly or lcd repair videos. Let me know what your going to do before you do it. I will guide you with hints and kinks. Ihave repaired 2 of these things. Here is hint #1 Take pictures as you disassemble!!! I'm louie12fix on fixya or lmistyrel@ aol.com BYE for now.
Repair Help & Product Troubleshooting for Sylvania CL772B 17" Flat Panel LCD Monitor

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