This TDS3054passes all diagnostic testing including signal path compensation.  Call Keith at 209-386-7544 with questions. The photos above are the exact unit you receive. As you can see from the photos the display is a very little bit yellow tinted at the bottom of the display (Almost unnoticable). If it is not acceptable for you I have new displays that you can purchase for $250.00 and do the work yourself, if you are knowledgeable about repairing these units, but only after you are certain you are not going to return the unit, since it will be sealed before delivery. I personally feel it is good enough as it is, and I am very particular about the test equipment I sell. 

The Tektronix TDS3054 is a 500Mhz 5GS/s sampling rate 4 channel color Digital Phosphor Oscilloscope.  

The Tektronix TDS3054 oscilloscope is a graph-displaying device – it draws a graph of an electrical signal. In most applications, the graph shows how signals change over time: the vertical (Y) axis represents voltage and the horizontal (X) axis represents time. The intensity or brightness of the display is sometimes called the Z axis.

The Tektronix TDS3054 oscilloscope's simple graph can tell you many things about a signal, such as: the time and voltage values of a signal, the frequency of an oscillating signal, the “moving parts” of a circuit represented by the signal, the frequency with which a particular portion of the signal is occurring relative to, other portions, whether or not a malfunctioning component is distorting the signal, how much of a signal is direct current (DC) or alternating current (AC) and how much of the signal is noise and whether the noise is changing with time.

The TDS3000 Series digital phosphor oscilloscopes pack the power of digital phosphor waveform acquisition technology, WaveAlert automatic anomaly detection, OpenChoice documentation and analysis solutions with e*Scope® web-based remote control, and five application-specific modules into a lightweight, battery-capable design.

Features:

• 500 MHz, 300 MHz, and 100 MHz Bandwidths
• Sample Rates up to 5 GS/s
• 2 or 4 Channels
• Full VGA Color LCD
• 25 Automatic Measurements
• 9-Bit Vertical Resolution
• FFT Standard
• Multi-language User Interface
• QuickMenu Graphical User Interface for Easy Operation
• WaveAlert Automatic Waveform Anomaly Detection
• OpenChoice Solutions Simplify Instrument Control, Documentation, and Analysis e*Scope Web-based Remote Control
• Built-in Ethernet port
• GPIB, RS232, VGA
• TDSPCS1 OpenChoice
• WaveStar Software
• Integration with Third-party Software
• Application Modules for Specialized Analysis
• Plug-in Printer for Portable Documentation of Results
• TekProbe Interface Supports Active, Differential, and Current Probes for Automatic Scaling and Units