98 Accord, various help needed!!

My Accord has gone thru and is going thru the engine light covered
throughout the postings...mechanic replaced a (ignition) solenoid and
reset the code. Popped on again a couple weeks later, I’m going to
follow up on the various ideas and suggestions I’ve read here. The
weird thing is this, for about a year or so now, on occasion when I
lift off the gas pedal, my dash goes out for a second - radio, tach,
everything stops, almost like I turned the car off! The car runs,
doesn’t skip or anything. I chalked it up to a gremlin (a short
somewhere?) and continued to drive...happening more often now, and
with the engine light randomly coming on I’m concerned officially now.
The latest item is, I saw my temp gauge climbing....checked overflow
and rad, topped off both and no problem...a few months later same
issue! I really hope the head gasket isn’t going! Any direction on
these items would be greatly appreciated. Thanks!

1998 Honda Accord