Weird alarm sound on an ASUS CUSL2-M and then a dead machine

Palek

Senior member
Jun 20, 2001
937
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Hey guys and gals,

I need some help. My work machine which has served me for almost 6 months has decided to die on me. It has the mobo I mentioned in the title, an 866 Pentium III and had Win2k installed on it.

It was running just fine until Saturday, when I installed Platex, then did a reboot... Well, I wanted to, but the machine just stopped right around when it was supposed to restart with the VGA BIOS info. The screen was totally blank, did not respond to Ctrl+Alt+Del, and even when I tried a forced power down (holding power button for 4 secs) it did not turn off. So I yanked out the power cord. Then I restarted the machine only to hear the strangest warning sound ever emitted by a computer. It varied between a high and a low frequency, but the time it took to switch between the two frequencies did not seem to have any pattern to it. After that it just went dead and did not respond anymore.

I suspected CPU failure so I pulled out the CPU and had a look at it. I found no visible damage (burns etc.), but noticed that the heatsink had one of those despicable heat pads for heat transfer. Since I had no thermal paste with me I just decided to pop the sink back on as it was and give it another go. This time the machine turned on, but the CPU was running at exactly half of its designated speed - 433 MHz. It actually booted into Win2k, but I turned it off right away because I knew the head pad was not helping. Another reboot and the machine stopped responding again.

Now, here is what I fear... I had that machine running UD basically non-stop since I got it. Is it possible that the CPU just slowly died on me because of that stupid heat pad? Will thermal paste bring it back to life? What does it mean when a PIII throttles back to half its operational frequency?

Any suggestions will be greatly appreciated. Thanks!
 

AndyHui

Administrator Emeritus<br>Elite Member<br>AT FAQ M
Oct 9, 1999
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The ASUS CUSL2-M will set the processor speed to the lowest possible if it fails to complete a POST. This is known as safe mode: the processor is running at 6.5 x 66 instead of 6.5 x 133. Simply go into the BIOS and select the correct processor speed.

The thermal transfer pad is actually fine if you are running the processor at default speed.

An alarm sound does indicate overheat though.
 

Palek

Senior member
Jun 20, 2001
937
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The problem is that the boot process does not get far enough for me to do that... I turn the machine on, the HDD led flashes twice, and then nothing. No VGA info, no BIOS screen, nothing.
<EDIT>
By the way, I did actually try to change the processor speed, but the option in the BIOS was not available. The machine is an Epson machine, they might be using their own BIOS instead of the original...
</EDIT>
 

Palek

Senior member
Jun 20, 2001
937
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I need HELP!!!

Here's what happened today. I came to the lab armed with some thermal paste. I removed the thermal pad, put some paste on, then put the CPU back in and tried to start up the machine. No success. I pulled an ASUS manual off the net and proceeded with overriding the automatic CPU detection. Turned off JumperFree mode, set the CPU to 66 MHz FSB and the memory to 100 MHz. Flashed the BIOS by removing the battery for a minute. I turned on the machine and this time it booted up. I went to the BIOS to load the default settings, then rebooted. This time I was greeted with a totally blank screen again and a non-responding power switch. So I pulled the plug again... WHAT IS THIS? Do I have a dead CPU on my hands? Has anyone ever had a similar experience? Please help!
 

SpeedTester

Senior member
Mar 18, 2001
995
1
81
You sure the CPu fan is working? My Asus board screamed at me once with a weird
type Siren noise when the fan was plugged into the wrong fan header. You should try to
plug in a difrent fan in the CPU header and see if that works.
 

Palek

Senior member
Jun 20, 2001
937
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0
I tested the CPU in a different machine and it worked flawlessly. I tried a different power supply as well but I got the same errors. It seems that the motherboard is the bad guy. At least the computer is still running (although at 433MHz instead of 866 and at 100MHz memory speed instead of 133) so I can save all my data before it dies on me.