A7V8X fans and HDD still on at shutdown

[jfoxlee]

Hi guys, I'm new to the forum and would really appreciate some help with this problem.

When I shut down the PC, the CPU and graphics card fans, both chassis fans and HDD light remain on, despite the rest of the system shutting down correctly. I have to turn off the PC at the PSU switch to obtain complete shutdown. The odd thing is, this happens about 95% of the time; once in a while all the fans shut down OK, but the blue light on the side chassis fan stays on dimly (one of those funky AKASA Crystal Blue fans.)

Also, the internal clock appears to reset itself on occasion, but bizarrely all of my manually set parameters in the BIOS are preserved.

I built my PC 7 months ago, initially using an old ATX case to keep costs down, and recently transferred everything to an iCase Tower from Maplin Electronics. I had no problems in the old case, and initially no problems with the new one.

I've tried messing with the Windows Power Management with no effect. This is currently on Minimal Power Management, hibernation disabled, system standby=never.

BIOS options - Wake Up on PCI/modem/mouse/keyboard all disabled. Auto Power Up disabled.

Keyboard / USB wake up disabled on motherboard, ie factory jumper settings. Although I did initially set the board to wake up on Keyboard, I put this back to normal. Can't remeber when.

Is it a PSU problem? I've checked the underside of the board and can't see anything "grounding out".


My system is as follows:-

Asus A7V8X Mobo without Firewire
Athlon XP2400+
Crucial PC2700 single 512MB stick
Connect 3d Radeon 9500Pro 128MB DDR graphics
(no soundcard, using A7V8X onboard)
LG 52x24x52x CD-RW (GCE-8523B) plus 24x CD-ROM
IBM Deskstar 180GXP 120GB
Hiper 420W PSU

USB devices - Microsoft Optical Wheel Mouse, Thrustmaster Firestorm GamePad, Deskjet Printer

Windows XP. ASUS BIOS 1012, latest drivers for devices.

One Chassis fan and GPU fan running off PSU, remaining chassis fan and CPU fan off 3 pin sockets on motherboard.



Any help gratefully received!!

[rpertusio]

Welcome to TechIMO!

Although highly unlikely, you should check that the CMOS reset jumper is either (1) not missing or (2) not set on the wrong pins.

I believe that without a jumper, the computer will never want to shut off. (Another characteristic is that the power button on the front of the computer acts more like a 'reset' button)

- rp

[jfoxlee]

Thanks for the reply. The CMOS jumper is present and correct, but the clock is still resetting itself. Bizarre.

[fatal714]

If your all your bios settings also resets also, replace your CMOS battery on your mobo.

I have the same problem, my psu doesnt shut off after shutdown. I have APM selected, APCI compliant mobo, an ATX button and the lastest official bios update. It worked in the before for a short period but apparently not anymore. My computer runs lovely, no problems.

-Custom System-
P4 2.4a @ 3.0Ghz
Asus P4t533-c Bios ver 1011c
Gainward Ti4200 128mb
SB Live Platinum
Windows 2000 Pro SPK 4

[jfoxlee]

Cheers. I'll definitely try the battery though the mobo is only 10 months old. Thought they were supposd to last for years!

The fan problem is annoying, but you're right, the PC works fine. I'll leave it alone!