QCX: top row blocks on display, but CPU responds to ISP #avr #display #troubleshooting


Andrea Massucco IZ1IVA
 

Hi,

I've given another look at my faulty QCX (see https://groups.io/g/QRPLabs/message/42064 ), which all of a sudden stopped booting up. I've had success hooking it up to a PC via an AVR programmer: the CPU responds and I was even able to upgrade the firmware from 1.03 to 1.07a!

Alas, the QCX still displays a row blocks on its display, so I'm again stuck...

Any ideas?

Cheers
--
73 de Andrea IZ1IVA - cq at iz1iva . net - http://iz1iva.net

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