06/10/2023
Hi Everyone,
A couple of interesting jobs last week involving motherboard repairs, The first one an Acer laptop wasn't turning on or showing any lights when plugged into the charger.The second was a lenovo laptop which would play a musical tone upon starting but that was it the laptop appeared to start but no signs of life.
Back to the Acer after examining the motherboard and testing with a multimeter it was determined the charger IC chip was to blame for the troubles along with a 10 ohm resister these are shown in the pictures, after ordering and resoldering the parts the laptop was good again.
The Lenovo was a different story, the musical tone in fact is a error code that can be translated by downloading a app from Lenovo.
That particular error code related to a problem with the TPM chip on the board which handle the security features on the board by encryption and stores the hard drive bitlocker keys etc. Basically without this the board needs replacing luckily a board was availiable for a good price.
Fitted the new board, luckily bitlocker was disabled on the drive so it was pretty straight forward.
Thanks everyone for your continued support on Facebook and Google etc.👍