TDS784C Tektronix Digital Oscilloscope (*May need repairs)

Description

PLEASE READ CAREFULLY. This is a Tektronix TDS784C. The front bezel label says TDS754C but the internals were upgraded to the TDS784C when I purchased (see boot / diag picture).
This unit is being sold AS-IS with no returns. All channels are in working order BUT they will randomly go off-line when using short time bases (<50nS and high sample rates <1Gs/S). Running diags (returns no errors) or power cycling corrects. Hence it is being listed for parts or repair.
Feature highlights:
Weight 31lbs (as pictured)
Dimensions (LxWxH) 17.1" x 17.5" x 7.6"
Bandwidth: 1 GHz
Channels: 4
Sample Rate: 4Gs/s
Record Length: 50 kPts
Display: Color
Up to 400,000 Wfms/s
1 % Vertical Accuracy
8-Bit Vertical Resolution, over 11-Bits with Averaging, and Over 13-Bits with Hi-res
1 ns Peak Detect
1 mV to 10 V/div Sensitivity
Up to 1 GHz Differential Measurements
Channel Deskew
Record Lengths to 8M Points
Floppy and Hard Disk Storage
Advanced Triggering
29 Automatic Measurements and Measurement Statistics
FFT and Advanced Math
Waveform Histograms
Limit Test
Communication Signal Analysis Including Mask Testing and SONET/SDH and Fibre Channel Optical Reference Receivers
Full GPIB Programmability
Ships only with what is pictured. No probes, accessories, or manuals are included.