d1rac

here's a video

i'm talking about the barrel jack on the dg20 itself, i bought a replacement off of amazon and soldered it in. there were old corroded batteries inside that i removed from the unit but the circuitboards inside don't look all that bad.. would a picture be useful?

originally it wouldn't get any juice at all due to a corroded dc power barrel. i replace that today and now when i switch it on the light blinks red for a second before powering off again. apparently it's common that transistor T3 malfunctions (and it's only there for a power saving mode) so i bypassed that, but still no luck. I also sprayed contact cleaner into the switch. any other ideas? the service manual is here: http://www.warningwillrobinson.com.au/manuals/Casio%20DG10%20DG20%20service%20manual.pdf edit: it stopped lighting up altogether again. how can i test this switch?