Reply To: IR receiver suddenly stopped working

[marqs]

— Is the state of all the settings stored in the eeprom? If I dump it first before reflashing, can I reflash a dump to get it back exactly in the same state it is in now? Can I dump the current state of the eeprom with the usb blaster or should I use an external dumper?

Settings are stored on same the flash chip that houses FPGA bitstream. Updating the firmware does not technically erase the part of flash that contains them, but settings made using other fw versions are not read since there are no code to validate them. This applies to update via SD card, but JTAG update should be the same (unless altera tools make a full chip-erase which I highly doubt). So as long as you flash the same version, your settings should persist.

I don’t have a device that can measure the Y1 frequency, but everything else on the device is working fine, the 4x scale mode that it was stuck on when the IR stopped working, hdmi audio (with the addon board), etc.

It’s highly unlikely that Y1 frequency would have drifted significantly, but that would at least explain why IR signals are not recognized (would also cause testpattern refresh rate to change from 60Hz).

I did get the FPGA from aliexpress, so maybe it actually could be a bum chip?

There’s always a chance that you’ve got a chip that has been rejected by QC and still found some way to market. Not knowing the origin/supply chain is the downside of ordering chips from Aliexpress.