Hi all!
I've spent a lot of time trying to fix amplifi 75 rebooting. I did a lot of manipulations (check voltages, capacitors, cloning SD, replace SPI FLASH memory chip, re-soldering all of chips etc) without any success. Finally the reason was in "brown glue" drop on SRAM chip' pins. It looks like the "brown glue" conducts some current. And it causes corrosion of uncovered wires also. So remove the brown glue and wash the PCB first!
And I share SPI FLASH dump in case you need it. You can use chip bigger volume, so you have to use padding/repetition of binary image! Good luck!
https://drive.google.com/file/d/1Cwq8rWINiJfe2zOeXGtrcw8SK_ybgVRQ/view?usp=sharing
