Check the listing for details. HP8753ES Consulting via Video Link. Tutorial or Repair. 8753D 8753E. Listed at 60.00 USD. What you are buying is 45 minutes of my time via a video chat link at a time that works for you.During that time, we can cover one or more of the following: Demonstrate how to use an HP8753D, HP8753E, or HP8753ES instrument to make return loss measurements, how to calibrate the instrument, etc.Look at your instrument and diagnose issues. Time permitting, we may be able to start the repair or point you to additional resources to be able to complete the repair in your own time. Some simple issues (like inverted displays) can be solved during the time available.If you are selling an instrument, I can walk you through a quick inspection to see whether or not it is working properly and help you to determine what price point might be fair to maximize your profit and achieve a quick sale. Common repairs that we can diagnose and fix: Dim LCD (HP8753E, HP8753ES)Completely black LCD (chances are you don't need a new LCD, only a new backlight. I can show you how to confirm).Inverted display (HP8753E, ES)"Caution: Probe power shut down!"A non-standard response from the unit on one or both channels Certain repairs are more difficult to do via video link. These include: "Caution: No IF FOUND. Check R input level." This error often points to a broken source module including possibly a failed YIG oscillator. I can get you started and give you your options for repair (including the $700 fix or the $60 fix), but 45 minutes isn't enough time to complete a repair on this issue due to the complexity.The physical repairs to fix either the electrical transfer switch, the stepped attenuator, or one of the port couplers if it has been damaged with ESD. We can probably isolate the problem, but the actual repair may take longer than the allotted 45 minutes. Upon purchase, I will send you instructions to set up the meeting and a list of tools needed to make the time as productive as possible. For repair troubleshooting you need: Your HP VNA. I am currently only supporting the 8753E, 8753ES, and 8753D models as these are the ones I know best.Proper ESD protection (wrist strap, etc).A 50 ohm load and any adaptors needed to connect this to your machine. For example, if your 50 ohm load is SMA, you will need an SMA to APC-7 adaptor.Screwdrivers: Torx T15, T10 and T8 at a minimum.Highly desirable if available: A power meter and sensor, such as the HP437B and HP 8482A.A spectrum analyzer such as the HP8648C that goes up to at least 1.5 GHz. More advanced repairs such as source troubleshooting cannot be completed in a single 45-minute session. Simple repairs (such as display issues or locating where the fault is located) should be possible. For these more complex repairs, I will point you to resources to be able to address these issues (instruction manuals, videos, etc) or you can purchase a 2nd session. If you simply want a tutorial, please let me know what types of measurements you plan to perform on the machine and I will prepare accordingly. MONEY BACK GUARENTEE: If we don't solve your problem in a way that you appreciate, you let me know and I will offer you the refund that you think you deserve up to 100%.NOTE: This is consulting only and does not include any spare parts which may be required to fix you instrument. Why you might want to try this rather than sending it to a test-house for repair? Because at a minimum you will save yourself the cost of shipping your instrument (likely around $200 round trip) nevermind the quote that could easily be from $500 to $3000+. If you'd rather have me fix your machine by shipping it to me for the repair, please use the "ask seller a question" feature to discuss options.About me: RF/Antenna designer for the last 20 years. 30+ US patents. I starting fixing dryers, VCRs, and other electronics (as well as vintage mechanical watches) in the 1980s. I have worked on repairing 8753s for the last 7 years after using them professionally to design antennas since 2002. Previously employed by Sony doing antenna design as well as other smaller consulting firms.