Let's be honest. Computer laptops come in so many shapes and sizes it is hard to keep count with a computer database the amount different PCB boards and designs there are for most laptops. Diagnosing each individual dead board is very time consuming and might not be successful after all. This is why we have introduced the Ultrasonic cleanings to the public.
Water/Liquid damage, What is it?
Ok here goes it, Liquid enters to your motherboard, and starts running down the board and starts to damage things.
SImply, becuase water has freely moving electrons and can be conductive if there is any hints of minirals. if enough voltage is introduced, water splits into hydrogen and oxygen in the process coating that which made the molecules break up, Oxidize. That Oxidization is what causes the bad "water damage". The Other freely moving liquid will short out the DC capacitors to groud and simply turn off your machine.
How do we fix water damage?
So there are so many moving parts to this. If water enters when the machien is off, all you need is a cleaning and you are good to go. Assuming you had the machine on and water or liquid entered, and it turned off, you quickly pulled out batteries and waited for it to dry. then sent it in to TDR, then an Ultra SOnic cleaning will bring your mahcine up, if an only if you did not short out a sensitive compenent causing it to burn out. If you have burnt components then an ultrasonic will clena your machine, some functions might come back to light, but the burnt circuitry needs to be fixed.
Where can I get burnt componenets replaced on my motherboard?
This is something that we are currently in the process of getting our hands into. as this is the pile of random repairs, which requires hands on schematics work with every single laptop. This is a very niched repair that is very difficult and usually is only performed on the more modern laptops that have just lost their first year of warranty. Note that some water damage is not covered by manufacturers warranty statement.