I have a phillips wac 7500 it has power going to it but wont light up or work. You can fans and the drive starting up when plugged in. Have also tried changing the fuse in the plug.
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The green light means there is standby power to the motherboard. Power button may be broken, does it 'click'? With the case open, do any of the fans start, then stop? If yes to the above, you may have a bad power supply. Can you borrow one to try? Last test before it's the chip or mother board: Remove the connectors for power from drives, video card, all but the motherboard (Do NOT disconnect small connectors on the motherboard, just POWER from the drives and video card) Remove any expansion cards except video. Note where they go. Try again. If it starts and fans run ok (video may not work but fans go normally.), shut it off, reconnect the video card. Try again, power off, connect or install one thing at a time until it stops running again. The last item plugged in is the culprit. Always one item, power on, try it, then power off, try the next one.
the power supply is bad. I had to same problem with mine after a power outage. Luckily I had a spare TIVO series 2 receiver with an identical power supply. Popped it in the busted TIVO and I am back in business.
If the cpu/heatsink fan isn't turning then most pc's will shut down to avoid further damage to cpu & board. I would first replace the fan if it's the one over your cpu. Try replacing power supply. If your board has the 4 pin plug, you must have that plugged in. But keep in mind if that fan isn't running a new power supply isn't going to make it start working. You have to have that fan working. Then go from there. If once it is working & other devices like video and/or roms aren't, check your memory. The best way to troubleshoot devices are to plug one at a time in and power up until the problem starts. Hopefully you won't have to go to that step.
The reason that your AGP card fans are on and your drives are on is simple because those devices have power. If the fan on the processor isn't working, then look for the wire that rut ns out of the fan and into the motherboard. Make sure that's plugged in. If it's not, then plug it in, but if it isn't this most likely means that your Heat Sink/Fan is broken. I woulnd't start your computer if the fan isn't working because your processor might overheat. One thing, if it doesn't beep, that means that it's not posting, which means start up tests are failing. Right now it seems like your processer is the problem right now, but I would take it to a repair center just to be sure.
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