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Hi The laptop gives this error at the BIOS boot up stage. The fan sounds like it spins up and down a few times. The system then shuts down. I opened up the laptop and the fan spun freely with my fingers. I put it back together, updated to the latest BIOS and it was ok for a few days. It’s now doing the same again. Any ideas please ? Thanks
Fan needs to be replaced, had one that would intermittently display that error and replacing the fan fixed it. This is on a HP TPN-C125 general model.
Hi @netdudeuk I’ve fixed with this issue a lot in the past with HP. The bios on many older models can get stuck and will need a CMOS battery reset. You can simply remove the button battery and re-install, but I would recommend replacing it. It would be a good idea to complete a BIOS update as well if one it available. If this issue continues even after the battery is reset, it may be a sign of BIOS failure.
Have you tried blowing the dust out of the fan? Too much dust can make a fan under-perform , which will cause a 90B error.
Hi I removed the heat sink and fan and there wasn’t a speck of dust. I applied thermal compound and re-fitted it. I replaced the backup battery. The laptop started up ok many times. The error had returned this morning though. I turned the laptop onto it’s side and blew into the vent. It then started up ok again ! I wonder if there are certain positions where the fan cannot start ? There are plenty of replacement fans for HP laptops on eBay UK but it isn’t clear if they would be compatible. For example, this looks similar. https://www.ebay.co.uk/itm/HP-17-X-Fan-1… I have attached a picture of mine. Thanks
BTW, thanks for the previous replies.
