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I have a Monitor that will not power up


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#1 Nephilim333

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Posted 23 June 2012 - 03:16 PM

hello
I have a monitor that i got from a friend, it is nothing special ( model: proview, size 22 inch ).
I am not sure what is wrong with it all i know is it will not turn on/power up no light or any indication of power, i have opened it up and checked for any obviously blown capacitors but could not see any to my knowledge.

I am not a computer technician, but i believe with some guidance i can fix it. I once knew a guy who fixed monitors all the time and he told me the common problem he found was blow capacitors. He identified a blown capacitor by a lump and the end of what should be a flat round surface of the cylinder capacitors.

What else should i be looking for and how can i troubleshoot this problem.

I have a soldering kit on its way and a lot of faulty gear that i can harvest parts from. It would be really cool if i could get it working plus i need another monitor.

Thanks for any help in advance

Nephilim333

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#2 rotor123

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Posted 23 June 2012 - 05:22 PM

HI
http://www.badcaps.net/forum/ has a lot of useful tips.
This subforum Troubleshooting Computer Displays may be helpful
http://www.badcaps.net/forum/forumdisplay.php?f=30

Good Luck
Roger

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#3 Peleida

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Posted 20 July 2012 - 11:04 AM

Hello,
The best test of electrolitic capacitor is replacing them by new ones with the same capacitance (microfarads) and the working voltage. To begin with test the fuse. If it is blown the bridge rectifyier may be faulty. If all so far are OK you should test the MOSFET transistor e the Schotty rectifier that stands before the capacitors referred above. This component is a dual diode and looks like a transistor and is screwed on a heat sink; the middlie pin is the commum catod and the other two are anods. Also look for burnt resistors.
Peleida.

Edited by Peleida, 21 July 2012 - 10:03 AM.





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