elorahd wrote:
I have a pv-dv52d that I bought used on ebay. It was in fine working
condition when I bought it. I've been using it for a while and, all of
a sudden, the other day, the screen and viewfinder when black

Sorry I have no idea how to fix it. I would suggest that the most
cost-effective thing would be to buy another similar one instead. Since
you already have a working battery, power supply, cables etc. you could
likely get one with these items listed as missing, for maybe $50-100.