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When I measured them again, detached from the board, the values were OK.
So the problem is a short circuit somewhere else. Could be the atmega chip, perhaps the USB input ports are fried...
Desoldering this chip is not something I am really looking forward to, and if I need to replace it , I probably need to flash the eeprom, program, "fuses" , boot-loader (?) etc (I am used to PIC microprocessors, atmega seems to have its own way of doing things)
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I removed the varistor and the capacitor.
When I measured them again, detached from the board, the values were OK.
So the problem is a short circuit somewhere else. Could be the atmega chip, perhaps the USB input ports are fried...
Desoldering this chip is not something I am really looking forward to, and if I need to replace it , I probably need to flash the eeprom, program, "fuses" , boot-loader (?) etc (I am used to PIC microprocessors, atmega seems to have its own way of doing things)
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