Ps Vita Slim Orange light on for 1 sec, but doesnt charge

Hello there,

ive tried everything. from cleaning everything, to reconnecting, diffrent cables and adapters, a diffrent battery, even taking the whole console apart. No fix has worked and i am so close to just buying a new MB as i think thats the only thing left that could have an issue.

got it on ebay btw and was told everything works... thinking about taking legal action and just getting my %#*@ money back, but i´d like it way more if i could just fix it and use it.

any help would be lovely