Greetings, that problem has happened to me very recently test: - Clean the RAM with a cheese eraser and the RAM contacts and if you have the possibility to change the RAM, if you have two test one by one to see if there are failures in one of the two. - Also changing the battery can be the reason why it does not work, try taking out the battery and disconnect everything to the source and keep the power button to discharge all the capacitors connect everything again and test, restarting the CMOS jumper . - If you have to change the microprocessor it may also be the error, that it no longer works correctly and is damaged. - Changing the power source to verify that the one you have does not present any errors. - Your badge died, it can happen, what happened to a better life. In my case the board was no longer working :(