P5LP-LE power issues.

[McFloyd]

Hi all,

I'm new to this forum, so: hello everyone!!

My PC is a HP Pavilion Media Center (m7730la) with an Asus P5LP-LE board. The first issue I explerienced was no power at all when trying to turn on the PC.

I tested with a new PSU (at a friend's lab), and it worked fine. Fine just one time I should say. When I took it home, the PC started acting very weird, it turns on, but then I hear the CPU fan go crazy, reving up real fast. I get to the BIOS menu, and then the PC shuts off.

I try again, but sometimes gets back to the BIOS menu, sometimes it shuts off before that.

I cleared the CMOS (using the pins, and removing the battery) and it keeps doing the same.

By the way, only the board, fans and power button (and leds) are connected to the board, no other device is connected to the PSU.

Any ideas of what this could be? is it possible the board is done?

Any help will be appreciated.

Thanks!

 

[erocker]

With the CPU fan spinning up like that it sounds like the CPU is overheating, then shutting down before you can do anything. You'll need to take the cooler off, clean off the cooler and the CPU, reapply thermal paste, then reseat the cooler. Hopefully it will solve the problem.

 

[95Viper]

What erocker said, plus re-check all the connections and re-seat all the cards, memory, and such, just in case they may have come loose during the trip to the lab.

Look on the motherboard for any foreign objects, like screws loose metal, which may have landed on the MB.

 

[McFloyd]

Thanks for your reply guys... I checked the thermal plate and is clean, all fans are clean and working fine. I took all the slot components out, the board is clean and free from foreign objects.

I don't think the CPU is overheating, the PC barely stays on 10 secs.

Now, it looks the first time I turn it on, stays on the longest (~10 secs) on consecutive tries the PC shuts off almost immediately 1-2 secs.

I even took the memory simms out, and it starts beeping, but it shuts off in about the same period.

This is very strange.

Now, the new PSU is 450W max output, not sure how much the other was, but I believe it was around the same wattage... do you think that may be the reason? What happens when you use a higher max out PSU on a board? does it uses only what it needs?

What do you think?

 

[temp02]

...
The first issue I explerienced was no power at all when trying to turn on the PC.
...

Can you say what might have caused this issue (PSU gone bad, power cut, lightning, etc.)?

Also, have you changed the CPU?

 

[A Cheese Danish]

It also sounds like a CPU issue to me.
You may also want to try a bigger power supply (although I'm not sure why that would be a problem if
the two power supplies used were the same power rating)