Item Description:
This listing is for a Radio Shack TRS-80 Model 4 Microcomputer with the TRS-80 Model III/4 Operation and BASIC Language Reference Manual.
The TRS-80 Model 4 is one of Radio Shack's most iconic vintage business and personal computers. Introduced in the early 1980s, it features an integrated monochrome CRT monitor, full-size keyboard, and dual floppy drive bays. The Model 4 remains highly sought after by collectors, restorers, and vintage computing enthusiasts.
A significant amount of diagnostic work has been performed on this machine.
After a RIFA line filter capacitor in the power supply failed, the failed RIFA filter capacitors were replaced. Following the repair, the computer booted and operated normally for a period of time with a fully functional keyboard.
The computer has since developed a video display issue.
Based on our troubleshooting, the computer itself appears to still be operating correctly. It continues to respond to keyboard commands, execute programs, and generates an active video signal that has been verified using an oscilloscope. The CRT monitor also produces a good raster when the brightness is increased sufficiently. However, no readable text is currently displayed on the screen.
The floppy drives have not been tested.
We guarantee the portions of the system that we have tested to be functioning as described above. However, because of the existing display issue and the inability to fully evaluate every subsystem, this computer is being sold AS-IS for restoration, repair, or collection. Please review the description carefully and examine all photographs before purchasing.
Cosmetically, the computer is in good overall condition for its age. It could benefit from a general cleaning and shows normal wear consistent with decades of use and storage.
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ITEM CONDITION:
Used vintage computer.
The failed RIFA power supply filter capacitors have been replaced.
Extensive diagnostics have been performed. The computer previously operated normally following the repair but currently no longer displays readable video.
Testing indicates the computer itself appears to still be functioning. The keyboard responds to commands, programs execute, and video activity has been verified with an oscilloscope. The CRT monitor produces a good raster when brightness is increased. The floppy drives have not been tested.
We guarantee the portions of the system that we have tested to be functioning exactly as described above.
Because the machine currently has a display problem and has not been completely tested, it is being sold AS-IS with no returns or refunds.
Cosmetically, the computer is in good overall condition but would benefit from cleaning. Please review all photographs carefully for the exact condition.
ITEMS INCLUDED:
Radio Shack TRS-80 Model 4 Microcomputer
Integrated keyboard
Integrated CRT monitor
Integrated dual floppy drives
Integrated AC power cord
TRS-80 Model III/4 Operation and BASIC Language Reference Manual
NO OTHER ITEMS ARE INCLUDED WITH THIS LISTING.
SHIPPING NOTES, METHOD AND SPEED BEING OFFERED (and optional local pickup):
Ships via UPS Ground.
Local pickup is strongly recommended. Due to the size, weight, age, and fragile nature of vintage CRT-based computers, local pickup is the safest option. If shipped, the unit will be professionally packed, but shipping is expected to cost approximately $200 depending on destination.
Local pickup is available.
NOTE 1: Even if shipping is stated to be free, additional shipping charges may apply to Alaska, Hawaii, Puerto Rico, Guam, and other United States territories. Free shipping is always limited to the contiguous United States unless specifically stated otherwise.
NOTE 2: If the item sells for more than a certain dollar amount, we may require a signature upon delivery.
NOTE 3: Address changes after purchase will not be accepted.
SALE TERMS:
-This listing includes only the items both pictured and described.
-The machine has undergone significant diagnostic work, but not every subsystem has been tested.
-We guarantee only the portions of the system specifically described as tested in this listing.
-The floppy drives remain untested.
-This is vintage computer equipment over 40 years old. Additional issues may exist that have not yet been discovered.
-The machine is being sold AS-IS because of the existing display issue.
-No returns. No refunds.
Please ask any questions before is expected immediately or within 24 hours of purchase.
ITEM SPECIFICS AND response:
If the item differs substantially from this description, please contact Vetco Electronics immediately upon receipt.
Please contact us before leaving negative or neutral response. We work hard to resolve problems fairly.
SHIPPING:
-Orders placed before 12:00 PM Pacific generally ship the same business day.
-No shipping on weekends or holidays.
-Tracking is included.
-Combined shipping is available when practical.
-Local pickup is encouraged for this item.
HOURS OF OPERATION:
-We are located in Bellevue, Washington.
-Our online sales department operates Monday through Friday.
Thank you for shopping with us!
- Vetco Electronics
Established 1989
