A flat rate envelop will only damaged the computer even more during transit and with that said your shipping cost is still incorrect! I think it would be safer to use a flat rate box and spend the money on shipping.... There is no way shipping for this computer is $5.55.....
I was going to ship it wrapped in a legal sized flat rate envelope..but after all the comments I'm receiving I'm probably going to make a note and switch it to a flat rate box.
looks good to me fanned and watching... got my fingers crossed on this one.. not a hard fix if it's just a shorted charger port. I have fixed several with that issue.. Takes more time then money. As long as it didn't short out the battery or damage the battery should boot up once repaired