I have an XM600 that will not power up. The light on the power button lights up in amber. I have replaced the power supply with the same results. The PC worked and I gave it t my niece. When she put it together to use it would not power up. This is where I am now.

most likely a bad power supply or motherboard. Replace the power supply 1st

press and hold power button it is in hibernation mode when light is blinking power button is a momentary type of switch...

Hello there:
ok unplug everything from the board first and power up and see what happnes. if nothing still unplug the powersupply to the motherboard and press in the power button and hold it in for 1 min and than plug in the powersupply to the motherboard and see what happnes. Also doublecheck the jumper for the cmos. ok please keep me informed there is a lot more that we can do but lets try this first ok best regards mike

can you try this? unplug the pc, hold down the power switch until the amber light goes off, then (with the pc still unplugged) push the power button to see if the amber light comes back on, if it does, repeat the first step. do this until no light comes on when the power button is pushed. after you've done this. plug the pc back up, then hit the power button. what happens?

ive had this happen to a lot of my dell pc's here at work, but all i can figure out is that its a mobo problem, i also have tried swapping PSU's, but it didnt help.

I had the same issue with my Dell Dimension 5150 and I replaced the front I/O USB Audio Panel and it booted right up.

A flashing amber light means a power supply problem usually caused by a bad power supply. Replace the power supply and everything should work fine for you.

inside the pc there should be a green light. called flea light. if its not on.. then id say motherboard or power supply are bad.
take power cord off. and hold power button down for 10 ecs. then reconnect and retry. i think its abad psu.

check your power supply. A flashing amber power button usually means its gone bad

Well hate to say it but that sort of problem results from a faulty motherboard or processor so if you say that you have changed the motherboard then you problem lies with you processor chip.