Power supply turned on my pc today no lights on no power checked fuse its ok moniter and speakers working fine

Remove the RAM and install it again and restart.....it will work if still not work then change remove RAM again and start your machine..it will give beep sound...if it will not give beep sound then understand your machine's mother board is faulty......

check your power supply..

try disconnecting all hard and optical drives. Try to power on. If it works one is probably faulty so reconnect one at a time to find the culprit.
Check the power supply also.

When you say the machine is dead do you mean you are getting no LED lights at all or do you mean it is not booting up? No power and no post are two different things. With no power you get absolutely nothing at all. With no post you may have some LED lights but nothing comes up on the screen. You said power and power supply tested ok. How are you testing it? I need more info please.

ya this problem is related with CPU Power Supply unit, please change your old SMPS and thn its working fine...

try to change your power supply

there is a problem in the low voltage power supply internally,or the speaker protection has kicked in.
unplug all speaker wires,and if the amp comes on,there is a shorted speaker wire somewhere.

take the moniter to a known good pc and see if it work if moniter works correctly it is your video card if not you need a new moniter

Check the main fuse
If that is ok look for puffed up capacitors on the power supply
Check the 1000ufd @ 35v change them to 1000uf @ 50volts

Good luck

Symptoms of a Defective or dying Power supplies on LCD TVs.
1. Light(s) on the front panel are behaving not normal example, blinking, amber color or not steady, fainting, etc.
2. TV not turning ON properly.
3. TV turns OFF by itself.
4. Needs to be unplug to many times to make it work.
5. Humming or high pitch noise heard through speakers or at the back of the TV.

I repair these power supplies. Write to [email protected]