OK i'm a computer technician and happy taking a PC/Server etc apart and finding the fault and just replace that part i.e. Memory/PSU/DVD etc. I'm happy to replace a screen in a DS or Phone etc
So since i work in IT everyone things i can repair anything that has Electricity flowing throught it so i've been asked can you fix my TV/Microwave/Car!/Monitor etc etc. My reply NO! ask an electrician lol
I want to learn more now. So i've said yes to fixing a few item but need help working out what's wrong with them but don't know where i should start probing 
So what i've got is a DS - Simple game slot broken so new one ordered and i've got a Solder Station ready to fix it.
These are the ones i need help with:-
Not so simple is a Leappad that when you switch on the screen flashes and then the unit goes off. So i'm thinking Fuse? Loose screen connection (see this on a DS)
Also to a cheap Ebay tablet that will not charge - Thinking Charge Port damaged?
How would you go about fault finding on these two with the problems described?
