repairing a tft monitor

Dude, You are an Ass Monkey!

Dale: Maybe....... remove the switch in the monitor and measure it again to make certain that the circuit it is connected to is not "shorted".... then, just for "fun" replace it with your "laying around" switch. This will confirm your diagnosis.

-- Best Regards, Daniel Sofie Electronics Supply & Repair

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Mima: "Dude"..... What in the hell is your problem? If you don't like the way he asked the question and don't like the fact that he is not as "technically advanced" as you are then please don't bother responding, especially with insults.

Thanks very much for your help Daniel, I've unsoldered the switch and it still measures as short, so im going to pop into maplin tommorrow and pick up a new one see if that helps. if not its only 20p down the drain anyway!? I'll let you know how I get on if you want.

All the best Dale

Dale: YES.... post the results of you repair attempt.

-- Best Regards, Daniel Sofie Electronics Supply & Repair

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Could be...some circuits, by design, are activated when the momentary switch is released.

Tom

Try simply momentarily shorting the pads on the PCB where the switch goes and see if it powers up. Are you sure you're measuring the correct pins on the switch and not the mounting frame?

Im measuring the legs of the switch, i've gone a bought another couple, (it would be rude to just buy one). I'll let you know how I get on Thanks everyone

just had another quick look at it(i'll put the new switch on a bit later). But can someone explain to me something that i've just thought of.

the tft power button is mounted onto a simple small pcb with nothing on it but the on/standby led and the power button and obviously a connector for the cables that then disappear off into the tft. But the button has only one track that goes on the pcb and obviously it flows off to the connector. As I said before I'm a bit of a dunce so far but I want to know how the power button will work if there is only one connection off one leg, surely it cannot open a circuit because that requires the switch to be connected at least two legs???!!!

cheers

Multi-layer board?

Tom

No, I dont think it is all the other connections and where they go are plainly visable. I've found the problem now anyway it wasnt the switch but a chip on the board which feeds in from the vga in and audio has gone pop. I'll try to see if I can source a new board if not just say the tft is ber.

How do you know the chip is bad? Perhaps you could just replace that part?

It's almost certainly a multi-layer board, they consist of two double sided boards bonded together, most anything that complex will use one.

the power switch is on a seperate board which looks like the simple one, with just that and the power led on it. the chip that has gone is on a different board which all the vga,power connectors are on. The chip shows sign's of over heating as there is scorching on the chip legs (brown) and the chip itself has a deep mark on it which goes down to a white section under the surface. I'll try to source either a new chip or board from the tft manufacturer and hopefully that will be the only component that has failed.

finally the guy im trying to fix it for said that his mate plugged the

Ouch, I'm afraid you're probably out of luck with that monitor. Maybe you can find one with a cracked panel on ebay?

Guys, I don blame experienced Teks for being angry at intruders....Anyhow, people who R not Teks are not sopposed to be here, not sopposed to fix bcoz they will be a waste of time 2 rest of the group....also I ask MEDERATOR to shut those loosers who post ( make money fast) scams, for God sake these donkeys don wanna get a decent job....bye

Huh? There's no moderator, this is the usenet. People who aren't techs are welcome here, I'm not really a tech either, all we ask is that people do a bit of research before posting so we don't have to answer the same questions over and over.