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barbone_ro

1 Message

6209

February 23rd, 2006 19:00

Alert! Previous fan failure

I got this Dell Optiplex GX1 desktop computer.It had no piece of hardware on it.Only the motherboard,power supply, and expansion card.So I put an Intel Celeron PII CPU(333MHz),some RAM,hdd, fdd,cd-rom.
The problem is that when I boot the computer ,on the screen appears this message( Alert! Previous fan failure).Since I didn't have the original processor CPU on it,I figured something was wrong with the CPU I put.
I checked Dell's website for specs regarding alert messages,but the search was unsuccesful.
Can someone help me?
Thx!
 

peterfelgate_ce40d3

1.3K Posts

February 24th, 2006 06:00

This occurs because the GX1 requires a signal from either a CPU or case fan  - if it doesn't detect the fan it issues this message and halts.  If you have the larger case desktop, the CPU was cooled by a case fan with a passive heatsink.  The case fan thus needs to be connected to the special connector on the motherboard.  If you have the small case where the fan was on the CPU, you need to get one of these fans and connect it up somehow.  The alternative to both is to short the appropriiate pins on the motherboard connector to fool the bios - but then you get no warning if the fan actually fails.   PS there's no way to turn this off in the bios.  PPS last week there was a discussion about fans here - http://forums.us.dell.com/supportforums/board/message?board.id=oplex_other&message.id=21826

The same applies to the GX1.

Message Edited by peterfelgate on 02-24-2006 02:10 AM

Message Edited by peterfelgate on 02-24-2006 02:11 AM

speedstep

11 Legend

 • 

47K Posts

February 26th, 2006 01:00

The fan could be bad OR the CPU is loaded with Gradoo.
Vacuum the deadly dust bunnies off of it and check to see of the fan is working.

TECH11931

2 Posts

July 10th, 2006 19:00

The signal the motherboard is expecting is 40 ohms to ground signal on white wire, which is built into original eqpt. fan. On the white (or yellow) wire, cut it near the fan and connect it to a 40 ohm resistor and the other end of resistor to ground (the case or the black wire). Had this problem a long time until I decided to get rid of it.

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