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Repair power board Panasonic DMR EX77?

DMR EX77 not switch on. Have someone an idea on wich is the problem in the power board? I have read something about the voltage regulator MR4020...
Jordi, September 2013
iam sorry for such bad manners in my last question reguarding my panasoic dmr ex77 not powering up, ie not saying thank you, iam sure with out your help many people would be throwing there electricals down the local recycling centres so please except my appologies , thanking you , boda. ps keep up the good work

boda, July 2017
checked all capacitors and all seem ok but still wont switch on Panasonic dmr ex77 about 8 yrs old

boda, July 2017
link Click here to see other fixes for Panasonic.