Tektronix AWG7052 repair



Have an AWG7052 with the error below,

Analog State

Channel 1 FAIL (C200110001)
Channel 2 FAIL (C200200015)

It seems that the internal loop back signal is not being detected correctly. This is a standard test that is run anytime the unit is to be used for signal output. Also, on power up there was an alert displayed stating that the calibration factors were not in memory. This could possibly be a defective memory backup battery.

Looking for recommendations for an individual or company that may be able to repair