Hmm, You may be able to help me! I Have 2 really nice IBM Thinkcentre 19" LCD Monitors, they come on for 5 seconds and then the display dissapears. The power light stays green.
Any idea's?
Yep, easy.
I can almost gtee that if you pull it apart and look at the power board you'll find a blown capacitor, or two. Now don't expect to see a capacitor with it's lid blown off and electrolyte everywhere cause they tend to deteriorate gradually on these switching PSU's; it's usually the large ripple currents at close to their V rating that breaks them down slowly. The thing to look for is cap with slight imperfections in it's lid cause they should be completely flat.
Today I removed the control module from our temperamental washing machine that decides when it wants to spin/empty/fill and does so on it's own accord and guess what... three capacitors on their way out.
Tomorrow or Saturday i'll post up the pictures of a capacitor that's on it's way out, but not blown, and compare it to a new capacitor. The small difference is in the lids, which i'll try and capture close up with my camera.
When replacing these capacitors get ones with a slightly higher voltage rating but ensure the value of the cap is the same. For instance if the broken down/blown cap is 220uF 400V cap then a 220uF 450V or 500V cap will do. And if you can get caps with max temps of 105'C, they are usually rated at 85'C, then go with the high temp ones.