Replacing cpu fan

Make sure the fan cables are plugged in on the motherboard. Or the cpu fan may have went bad and needs to be replaced.

I would remove your fan & heat sink to check that your thermal paste isn't dry first.

You can clean or replace the fan.
Get the manual from www.dell.com/support
You can download it free and look up the fan repair instructions.
Hope this helps.

This model (as well as many other Dell desktops) has a DUAL SPEED CPU fan. If the motherboard detects that the CPU temp is running hot it will increase the speed of the CPU fan to lower the temp of the CPU. You should do a Google search for the correct CPU fan and purchase it and install it back into your computer.

check your BIOS setup. you can fix the message appearing there.

you may have a bad mother board or power supply,however try a few of these,bare bone the system,no mouse keyboard,only monitor,remove all internal cards,power on.If no go remove memory ,power on if you get beep tones the motherboard is good.Question for you did the fan turn during these steps.Do you have a amber light on the power button,if you do the answer is you have a bad power supply.
Good luck

Which fan?, the cpu fan or the cpu fan?

Most Dell pc come with a below average power supply. I recommend replacing your power supply with a better one. Do a search on Google for a good replacement power supply for you Dell 8400.

Please rate response.

Sad to say but this model dell uses a specific fan made for dell. Unless you want to modify your cpu cooling system you will need to contact dell for a system specific replacement part. Hope this helps.

Hi

Yes, some systems (newer PowerEdge Servers, generally 6/7th Generation and above) have onboard VRMs.

1600sc is a 6th gen PowerEdge (with Simple Computing). I can checked and be absolute certain from within Dell. I'm on VAC until Saturday.

In the meantime, check the PRC model and revision and ensure that they match. Given that a single PRC POST/Boots, try upgrading (if not already) the system BIOS to latest revision.

If the PRC model/revision does match and you have the latest BIOS version, also if the VRMs are not needed, then from the Troubleshooting you have already done, we may conclude that the PRC 2 slot is faulty.

I will confirm the VRM query on Saturday.

PowerEdge 1600SC, BIOS A12 Update Package for Microsoft Windows - http://ftp.us.dell.com/bios/PE1600SC-BIOS-WIN-A12.exe
PowerEdge 1600SC, BIOS A12 Floppy Update Package - http://ftp.us.dell.com/bios/PE1600SC-BIOSA12.exe

Mike

Hi

Did you receive a VRM with the the PRC upgrade kit? And have you installed it?

The following items are/should be included in a microprocessor upgrade kit:
• A microprocessor (PRC)
• A heat sink
• Heat-sink retention clip(s)
• A voltage regulator module (VRM),
Your upgrade kit may also include a cooling fan.

If you are adding a secondary microprocessor, examine the VRM to ensure that it is the correct VRM for your system. Install the VRM in the appropriate secondary VRM connector, ensuring that the latches at each end of the connector engage. If you received two VRMs with the upgrade kit, replace the primary VRM already installed in the system with one of the VRMs from the upgrade kit.
Note: The system does not support mismatched VRMs.

Check PE1600sc Microprocessor Upgrade Installation Guide - http://support.dell.com/support/edocs/systems/pe1600sc/multlang/proc/9D904A05.pdf

Let me know how you get on

Mike