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Old 7th Mar 2019, 10:59
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Bmi-fan
 
Join Date: Dec 2011
Location: Belfast
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Laptop won't restart but shuts down ok

Never seen this one before:

Dell Latitude E5550 laptop with docking slot. Suddenly started to hang up when doing a Restart - it powers right down but won't trip over and reboot (power LED remains illuminated and fan still turning). Only way to get it out of this state is to hard power-off by holding the power button for 5 secs.

Bizarrely, it shuts down completely without any problems when a Shut Down is commanded.

Think it is related to a BIOS issue - there is a critical BIOS update available from Dell Support but updating the BIOS requires a Restart! Have tried installing the BIOS update, letting it restart automatically as part of the process and the hard powering it off when it hangs up. Unfortunately this rolls-back the BIOS update.

Anyone have any ideas what else to try?
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