Abit k7 mainboard shut down + alarm problem

RedWolf4000

Junior Member
Aug 18, 2004
18
0
0
Hello.

I am trying to help my friend with a computer problem he has. its basically a school/desktop pc. I am unfamiliar with Abit mainboards (what his system has) as i have never used anything but MSI.

The computer they have is around a year old, and it has been running trouble free since a few days ago.

Just recently, the computer can only run for around 2-30 minutes before it kicks off, (shuts off) and an alarm sounds that is constant, with two pitches, similar to a slow toy fire truck sound. I let the computer sit in the BIOS under PC Health to watch the mobo and cpu temps, and to watch the Voltage of each PS line. Everything seems perfect, the CPU detects as never getting over 50c, and thats not nearly enough to shut it down because of over heating. Also, the voltages are never more then .5 off, so i dont think it is that either. The heatsink of the CPU to the touch is quite hot. It wont burn you, but it feels very hot, as if it were a few degrees more, it probablly could burn you. Is it possible that the Bios reads teh cpu temps a few seconds behind? or that there is a heat spot building up that doesnt get dtected by the CPU temp monitor? Any help would be great, the system is as follows:

Abit K7 mainboard (i think)
AMD 2800+
2x 512mb pc3000 crucial
GeForcefx 5200
80 Gig Western Digital 7200rpm
2 optical drives
 

Fern

Elite Member
Sep 30, 2003
26,907
174
106
OK, first thing - Here are the beep codes for the mobo (for some reason they're not in the manual0 NF7 Beep Codes

Sounds like overheating (your fire truck remark). Might wanna d/l and install MBM5 to watch temps under load, instead of just seeing them in BIOS.

There are two places in BIOS where the overheating (shutdown) temps can be adjusted. One is in "Soft Menu III" and the other in "PC Health" IIRC. Might wanna check those settings in BIOS to see if they are set too low. (BTW, there a third setting for this - its the warning temp before shutdown)

Otherwise (1) make sure the cpu HS fan is working properly. MBM5 will report its RPM. (2) check for "dust bunnies" in the heatsink fins. (3) Might consider removing cpu, cleaning and re-applying thermal compound.

Abit's seem to undervolt cpu, but might wanna go into "Soft Menu III" and see what the vcore is set to (MBM5 will also show this, in fact you can set to run a log and look for any cpu temps or voltage spikes). IIRC, the vcore s/b 1.65v.

Good Luck with it and have a nice weekend.

Fern
 

RedWolf4000

Junior Member
Aug 18, 2004
18
0
0
Thanks for your information, i will check the vcore, and see if i can manually lock it at 1.65v, and i will also clean those dust bunnies out (its dust city in there)

If all else fails, i will try a new PS.