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Main => Everything Else => Topic started by: ratzz on September 03, 2008, 01:56:37 pm

Title: TFT Monitor Repair ....
Post by: ratzz on September 03, 2008, 01:56:37 pm: Hi all,

Have any of you any experience in dead monitors?

I have a (2 year old) 19" LG monitor that I was going to install in my cab, but it appears to be dead. My lead is fine, but the light does not come on at all.

I have looked everywhere for monitor repair in my area, but no-one seems to do it (I've mostly tried TV repair, as computer repair businesses aren't interested).

Can anyone recommend websites that I could look over to begin finding out what the problem is? I'm pretty handy (although not an electrician), and its worth giving it a try as I now have nothing to loose!

Thanks all,
Ratzz :cheers:
Title: Re: TFT Monitor Repair ....
Post by: ark_ader on September 03, 2008, 05:27:32 pm: Best to junk it and buy another.

They are cheap enough. Misco sells them real cheap.
Title: Re: TFT Monitor Repair ....
Post by: SavannahLion on September 03, 2008, 06:08:05 pm: Crack open the monitor and check the traces. It's possible that you have a blown fuse.

I don't remember who it was that had this kind of problem, but they had a dead monitor as well. Power was fine, but it was just flat out dead. Tracing the leads he discovered there's a SMT fuse. He couldn't tell what the rating was supposed to be and since he was plugging into a regulated power supply (I think, or was it a UPS? Whatever.... ) he jumpered the fuse and the monitor came to life.

I guess with SMT fuses, you can't tell they're popped unless you have a multimeter to check it out.
Title: Re: TFT Monitor Repair ....
Post by: ratzz on September 04, 2008, 04:24:17 pm: Quote from: SavannahLion on September 03, 2008, 06:08:05 pm
Crack open the monitor and check the traces. It's possible that you have a blown fuse.

I don't remember who it was that had this kind of problem, but they had a dead monitor as well. Power was fine, but it was just flat out dead. Tracing the leads he discovered there's a SMT fuse. He couldn't tell what the rating was supposed to be and since he was plugging into a regulated power supply (I think, or was it a UPS? Whatever.... ) he jumpered the fuse and the monitor came to life.

I guess with SMT fuses, you can't tell they're popped unless you have a multimeter to check it out.

Thanks for that Savanna -- I'll look into that.

Still didn't find anyone today, so I guess I'll crack it open!

:cheers:
Title: Re: TFT Monitor Repair ....
Post by: ratzz on September 09, 2008, 06:59:39 pm: Hi guys,

Following on from this, I plan to do some basic tests like checking internal fuses.

Are there any similar dangers to the charges on CRT monitors I should be aware of?
Title: Re: TFT Monitor Repair ....
Post by: padstack on September 09, 2008, 07:54:05 pm: not really. Just unplug it.
Title: Re: TFT Monitor Repair ....
Post by: ratzz on September 10, 2008, 05:00:33 am: Quote from: padstack on September 09, 2008, 07:54:05 pm
not really. Just unplug it.

Hmm ... just got a kick from working on the PSU :blowup: --- think it discharged itself through my arm.

Back screwed back on and in the bin!

Back to the drawing board: Will start here http://www.amazon.co.uk/Electronics-Dummies-Gordon-McComb/dp/0764576607/ref=sr_1_1?ie=UTF8&s=books&qid=1221037121&sr=8-1 (http://www.amazon.co.uk/Electronics-Dummies-Gordon-McComb/dp/0764576607/ref=sr_1_1?ie=UTF8&s=books&qid=1221037121&sr=8-1)
Title: Re: TFT Monitor Repair ....
Post by: Blanka on September 10, 2008, 05:03:51 am: TFT's have cathode tubes that need around 2000 Volts to be operated. Not very nice on the fingers. Open with care!