try factory reset
Restoring factory defaults
Before performing the verification procedures, restore the instrument to its factory front panel
(bench) defaults as follows:
1. Press MENU key. The instrument will display the following prompt:
MAIN MENU
SAVESETUP COMMUNICATION CAL
2. Select SAVESETUP, and then press ENTER. The unit then displays:
SETUP MENU
SAVE RESTORE POWERON RESET
3. Select RESET, and then press ENTER. The unit displays:
RESET ORIGINAL DFLTS
BENCH GPIB
4. Select BENCH, and then press ENTER. The unit then displays:
RESETTING INSTRUMENT
ENTER to confirm; EXIT to abort
5. Press ENTER to restore bench defaults, and note the unit displays the following:
RESET COMPLETE
BENCH defaults are now restored
Press ENTER to continue
6. Press ENTER and then EXIT to return to n