FMR Audio RNC1773 Compressor - Junk

One day, the compressor suddenly stopped producing sound, and it would only produce sound in bypass mode. I assumed the operational amplifier was faulty and attempted to replace it myself. However, as an amateur, my soldering skills were poor, and the issue remained unchanged. I've given up and am therefore listing it for sale. I will also include the operational amplifier I intended to replace it with (which also cost around 2000 yen).
This is a broken, junk item due to a failed repair attempt.
Would anyone who can fix it be interested?

The RNC1773 is a versatile compressor with adjustable Threshold, Ratio, Attack, and Release.

- Model Name: RNC1773
- Brand: FMR Audio
- Function: Compressor
- Adjustable Parameters: Threshold, Ratio, Attack, Release
- Bypass Function: Bypass Switch
- Gain Reduction Meter: Displays Gain Reduction

Thank you for looking.