Random reboots necessary.. possibly caused by surge or V spike

Clean Throttle Body (both sides, not just what you can see) and MAF (mass air flow sensor) [spray and shake to dry].

https://www.google.com/search?q=2001+Ford+Focus.+running+rough+and+power+surges
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A power outage is often accompanied by a voltage surge or spike. The modern fridge contains electronics and these do not like voltage surges so damaged electronics is a possibility though first it is necessary to discover whether power is actually reaching the inside workings of the fridge which means checking the power cord, connections, fuses, etc. with a multimeter.

My fridge is an older type without the fashionable electronics and when that refused to restart recently I gave the thermostat a sharp tap with a screwdriver handle. It started and mostly works normally but I bought a new thermostat as once it has caused trouble it almost certainly will eventually fail.

Cause of the power outage? Some possibility a power spike surge did it's work on electronic circuit board and controls.

Your refrigerator could have been a victim of a power surge or spike.
Modern appliances have circuit boards which are highly susceptible to surges & spikes and you really should have these type appliances plugged into a surge/spike protector.
If all else fails, have a qualified repairman come take a look at it, or contact the manufacturer.

Most surge protection power boards will protect computer equipment from mains spikes and surges.
A better and more expensive solution is to use an uninterruptible power supply (UPS). These units provide surge and spike protection and also provide power in the event of mains power failure.
Make sure you select an UPS model that meet the power requirements of all your computer equipment that is connected to the UPS with a mains down time of say 1/2 hour to give you time to shut down your computer in an orderly manner.

Power surges, spike and brown-outs are a nemesis to small refrigeration units. The capacitor for the compressor likey was affected and possibly the start components in general, especially if the unit was operating when the surge occured.

Possibilities:
1. overheating, and automatic shutdown.
Check that the fans are working.

2. bad RAM, causing "random" crashing.
On a "good" computer, download the free 'MEMTEST86+' software, and run it, to test your RAM.

3. Leaking capacitors on motherboard, causing "voltage-spikes", leading to "random" errors.

4. Bad disk-drive. Remove the disk-drive.
Connect it as a "slave" drive in another computer,
and run 'CHKDSK' ("Check Disk") to look for problems.

You NOT wrong sorry, sounds as if your controller may have been hit by a power spike surge :(

yes it may possible that a spike may came and damaged the sensitive chip you are been advised to attact spike arrester and surge suppreser before the computer replace the synaptic ic inside the device problem will be solved

Lightening does hit power lines, and cause voltage spikes; these voltage spikes do burn out electronic equipment. Surge protectors are used to prevent these voltage spikes from burning out electronics