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I checked and found that there isn't any connection between bottom and top layers at the jack power connector, maybe the via is corroded. So I installed a new power connector with two wires soldered both on top and bottom pads of the pcb, and it works perfectly Thank you very much!

DC power brick, that works with another 2600 Jr. I also replaced all the electrolytics capacitors.

Hi, I recently acquired an Atari 2600 Jr (PAL), but it shows no signs of life: the led indicator remains unlit and no RF signal comes out of the console. I opened it and found with a DMM that *after* the 7805 regulator there's the same high voltage of the external power supply, so I replaced the regulator but the voltage is still the same both at the input and output pins. What can be wrong with it? Thank you!