HP 8116A All Lights and -188.8.8 On Screen

[mkidd9106]

There's a lot of great info on fine tuning or dealing with error codes for The HP 8116A that I hope to eventually use.  However, I have a one that upon my original power on had nothing outside of the fan running.  After fixing a power supply wiring issue to CPU board I now get all light and -188.8.8 on the screen.  I've seen this same display status on other units listed for sale.  Is there a common issue or specific condition that causes this status?  This function generator has more capability than I will ever use, but it would be nice to get it back to an operational state.  Guidance or pointers would be appreciated.

Power Supply Voltages are pretty close as measured on main board:
5.184V
24.03V
15.034V
-5.25V
-14.97V
-22.8V

Thanks

[mkidd9106]

After finally finding the 8116A service manual, I learned the display will enable all lights during startup self test.  After a about 30 seconds the unit is functional.  When doing voltage checks the display was turned away from me, so I missed that it was operating.  Now I will calibrating and begin to use!!