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trying to diagnose this laptop so i can fix it. would a power surge fry the bios chip and make it unusable and how do i diagnose a dead cpu
Hi @techlord , You don’t state what the problem is or what indications (if any) are being shown by the laptop when the power is connected. If no indications of power then the first thing to check is if the all the distributed power supplies in the laptop are available when required. You did say that there was a power surge so checking if the power supplies are all OK would be the first thing to check before worrying about the BIOS or CPU. Electronics need power to operate. By this I don’t mean just the battery or the charger. They are just the primary sources of power. Their power is distributed by the various power regulators on the motherboard to supply the different voltages required by the motherboard, i.e. +5V, +3.3V, +1.5V etc. To find out if they’re all OK using the schematics (check that I’ve linked the correct one - the motherboard’s model number is printed on the motherboard) makes it easier than trying to look for any obvious problems on the board which I presume you’ve done e.g. damaged or burnt components. Once you have determined that all the power power supplies are OK then start with the IO chipset. It is the one that controls the motherboard and interfaces the motherboard with the CPU i.e. bIOs -Basic Input Output System. If it is getting power OK then you have to check whether it responds to the various inputs i.e. power button etc. If it does then you should get some indications when power is connected -charge light or when switch on, the fan, HDD etc. After that maybe look at the CPU
