Strange occurrence on our E4A (V6)

This afternoon, our E4A didn't power up for its normal weekly exercise cycle. And it was showing a yellow light.

I pulled out the control panel, and for a while, it was showing nonsense.

I pushed the start button. It didn't immediately react. Then, a minute or so later, it finally began to power up.

Once I was able to get a terminal sesson on it, I looked around.

I found a CPPEA58 in the system operator message queue. Opening that message gave me:

Cause . . . . . : A platform Licensed Internal Code error occurred.
Recovery . . . : Contact your hardware service provider and provide the
following list of possible failing items:
FSPSP28
FSP0200
FSPSP02


Looking at the Service Action Log in SST, I got two SRCs: B6004422 (count of 5) and B1817200 (count of 1). Looking at the B1817200, I got the same three items that I got from the QSYSOPR message.

But the only thing I found under "failed and non-reporting logical hardware resources" was DSP001, which is to be expected. And F10 from Hardware Service Manager gave me "No hardware resources currently require attention."

And a WRKACTJOB shows the correct time and date for the system TOD clock.

Any insights?

--
JHHL