Dell T7500 fan Failure problem - Failed to initialize

Question

After changing the motherboard's battery, I get these alerts every time I boot.      F1 gets me through okay and no other problems to to come forth. Everything works fine. Win 10 Pro x64  21H1   The net has many of the same messages..   Turn the box off,  take out the power lead, hold the power switch down until the motherboard light goes off, then re boot.   I have tried this with my T7500 a few times and it worked the first time until I rebooted and now it doesn't do anything when I do it.    There must be another way to fix the Alerts for Fan controller failure.   Thee are the messages..     All have 'Alert !' in front of the line.   Unable to initialize Fan Controller Front Chassis Fan Failure Rear chassis fab failure CPU 2 Fan Failure Hard Drive Fan Failure Air Temp sensor not detected.   Thing is, all my fans are working but the rear one is now quite loud.   Is this a hardware problem or is there a software resetting needed?   Basically, how can I fix this please?   oz

Chino de Oro · Accepted Answer

Hello @ozstar , in most of Dell precision class system, the fans are controlled by firmware (BIOS). You may have disturbed some connection onboard while changing the battery and confused the BIOS when it tried to initialize at boot.

Try to disconnect and reconnect all the fan power plugs. This include the fan on the riser, especially, clean out the fan vent on top of the chipset. Take out the battery to reset BIOS (and replace with a new one again if you like). It's normal if your system will reboot a few times when receiving power. Hopefully, it can initialize the fan controller properly again.

DELL-Cares · Answer

Hello, I see you are looking for technical assistance. If you need our help, you can start a private message with us and we will be happy to assist you.

ozstar · Answer

Out of warranty so back here to the forum. Any help please?

ozstar · Answer

Have responded via PM

ozstar · Answer

Where is the Fan Controller?  Is it software or on the mobo? How can it be fixed so it can be initialized to stop the fan failures?

ozstar · Answer

Many thanks 3 Zinc, I'll give that a go cause the noise it driving me batty

Precision Fixed Workstations

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