Just acquired The Getaway:High Speed 2. After the move I am having problems with the sound. Volume slowly declines the longer the machine plays. Gets to the point where volume is at maximum and sound is barely a whisper. Have to reset volume back to minimum when I shut it down because once it cools off it comes back at full volume. I have re-seated all the connectors on the audio board and done a general inspection and nothing's obvious. Does anybody have any ideas on what to look for first?
Also noted that U1 (LM1875 Amp) has been replaced prior. Thinking it may be bad again... maybe something else is wrong that caused it to fry again.
I have a FLIR and U1 is up to ~190F. Also noted that U10 (YM2151 Sound) and U13 (MPU68B09E) are running ~130F in the center of the chips.