Ok now that earlier post makes sense to me (you didn't give the model number). You said it had an A4 3400m ... in reality it has an A4 4300m (quite a big difference lol). So ... the answer to that post is yes, it will most definitely take an A10 4600m but ... the A10 5750 is a slightly better choice.
I guess none of that is too important now that it won't boot. If your battery is good, can you unplug the charger and boot it up from the battery only?