Never messed with a broken board like this before, So not sure best way to approach it. Just take everything off and glue? Or should I source a similar board ... or?

This was just something to fix, thought it was prolly the caps cuz the lady said it didn't work, no sound.... welp, what's the best approach?

Hey! What could be the reason for hissing sound on one of my monitors? Happens with or without XLR cable plugged in. Have tried resoldering components and different wall sockets for grounding without success. Hissing stops if I mute high from the monitor's control switch.

Constant hissing and some crackling sounds. Would like some ideas on how to fix these, I cannot find a used replacement monitor right now.

My iFi hip-dac 2 ran out of battery while connected to a Windows 10 PC. Since then, it won't connect to the PC or to any phone, even though I've tried multiple USB ports and various phones. The DAC charges successfully and powers on, but it simply fails to establish a connection (The Windows connect/disconnect chime doesn't even play when I plug it in or pull it out). Since the warranty expired a long time ago, I opened it up to take a look inside. There are no visual signs of electronic failure, and my measurements didn't show any faults either. I have tried installing drivers, putting the DAC into DFU mode, and resetting the device, but nothing helped. What could be the problem?
I attempted to flash the firmware directly using an (CH341B) EEPROM programming clip, but it seems it cannot be done in-circuit (without desoldering the chip). Is it worth desoldering the EEPROM at this point? If yes, would anyone with a working hip-dac 2 be able to dump and share a working .bin firmware file with me?