hello friends i have a board that i took out from a washing machine. the chip on it is atmega 64L. at first i tried to establish a usb ttl and uart connection using the (rx tx sck) pins as connection pins on it, but the chip did not react later. i tried to connect using the isp pins using arduino as isp, neither ide nor avrdedess could read the device imsa, it was giving the error ffffffff. then i created a high voltage parallel program device using arduino uno with the fusebbit doctor project i found on the net and connected the 64l pins of the chip that i physically soldered with the help of ide to the uno. i can set the l h and x bits from the serial port and the values are verified when i read. but there was no chip erasing code in the sketch code and i did it manually myself. and when I read the chip again with hvpp I realized that it was deleted but the bit settings were also deleted and I made a setting again and tried to connect with ISP again but it still does not see it and gives the ffffff error and IDE says no connection found. I am stuck now. What should I do?
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