Monitor Powersupply faulty?

[icecoolwas]

Basically I turn on my 17" Xerox TFT Monitor on today and I can straight away hear flickering like squeal, looking at the screen I can see it shake abit and the monitor looks abit purple, not good, so I ring up a monitor repair center and I am presented a fixed repair price of £40 + VAT, since I have a decent understanding of electronics and soldering (I did electronics for GCSE) I decided to have a hack at it myself, opened it up, discharged high voltage capacitors and took out the powersupply unit. I cant see any marks or of that sort, and I am wondering what it could be, straight away I notice two capacitors bulging, values of them are: 470uf, 25v, 105c. they are surrounded by 4 other capacitors, rated at 1000uf, 25v, 105c. I have decided to replace all 6 and I was wondering if you guys believe this will fix my problem? what else could it possibly be?














Thanks.

 

[icecoolwas]

anyone?

 

[alarm man]

£40 repiar bill seems a good idea now...

 

[icecoolwas]

£40 repiar bill seems a good idea now...

if so why?

I cant see anything else wrong with it, no burned components nor do the pcb's smell burnt, only defect I can see are the caps.

 

[pmac10]

sounds like a good plan to me, capacitors at those values cost pence, have a good look at the transformer/rectification stage and im sure youve checked board mounted fuses?

 

[sparkdog]

If the capacitors are bulging there is a very good chance that replacing them will cure it.

 

[icecoolwas]

If the capacitors are bulging there is a very good chance that replacing them will cure it.

Thank you guys, had the same OP in a different forum and got the same response, just bought the right capacitors online and I will post back with results on thursday.

 

[Izzy's Dad]

Looks like a switch mode PS to me.

 

[Golden_Boy]

anyone?

Although the capacitors are bulging they may not be responsible although a good place to start.

As the fault may not be on that PCB at all £40.00 isnt too bad for a garunteed repair.

 

[alarm man]

if so why?

because its still not fixed, so the time youve now spent on it,£40 seems quite good..

 

[icecoolwas]

well if it isnt the cause once I've replaced them, it was a problem anyway, they had to be changed, if it doesnt work I'll just buy a 2nd hand monitor of ebay for £40-50.