HP3561A DMA Autozero Timeout Error

[Johnny10]

After having a problem with my HP 3561A that I use on the bench.
I pulled out one of first pieces of electronic gear I purchased.
A non-working 3561A with the following error on start-up.


DMA Error
Watchdog Power up
Software Revision 2410
Return Error Code
1     2     03

Service manual shows this as an Autozero DMA timeout error.

Will be studying manual for better understanding of this error code.