Summary of This TRS-80 Model 4P is misbehaving

00:00:00 - 00:45:00

This YouTube video shows a user troubleshooting a TRS-80 Model 4P computer. The user has difficulty loading software onto the computer, and suspects that the problem may be with the rgbt HDMI port. He plans to test the floppy drives to see if they are working. In the next video, he will test the power supply and the analog board on the machine.

• 00:00:00 This TRS-80 Model 4P is misbehaving and needs a repair. Adrian unpacks it and finds a variety of packing material, including bubble wrap and Haribo Ginger lemons. The computer is in good condition and is small enough to move around easily.
• 00:05:00 In this video, a TRS-80 Model 4P is being examined and found to have some quirks. It was difficult to get the computer to turn on, and when it did, it had some tuning to do. The box also contains a business card for a business called "Micro Micro Muse."
• 00:10:00 This YouTube video shows an old TRS-80 Model 4P computer. The computer has various issues, including a power on condition Nation where you supposedly have to have the disk drives closed, and a keyboard that's not so great. However, the computer does seem to be able to load up some software, and it appears to be operational.
• 00:15:00 The video's narrator states that the model 4P is misbehaving, with the Reservoir cap controller issues being the most notable. He tries a few easy fixes and finds that the CRT isn't running, but the computer starts loading off a disk when the brake key is pressed. The computer has a white, creamy color and is held in place by screws and a handle. The narrator removes the screws and handle to reveal the computer's white case and 1983 date code.
• 00:20:00 The video shows a TRS-80 Model 4P that is misbehaving. The user finds and removes a foam and screws from the bottom of the machine, unplugs the keyboard, and removes the power supply. The user then tries to remove the back metal plate, but it is wedged. The user also tries to remove the motherboard from the tray, but it is stuck. The user eventually free the motherboard and finds bodge wires and a ROM chip.
• 00:25:00 The video shows a TRS-80 Model 4P that is misbehaving, with screws around the ports and a keyboard connector that is not aligned with the metal plate. It is difficult to get the cables off and the front panel is in the way. The keyboard is free so the user has to move it to safety. They eventually remove the screws and knobs and the front panel.
• 00:30:00 In this YouTube video, the author demonstrates how to modify a TRS-80 Model 4P to run model 3 ROMs instead of model 4 ROMs. He also shows how to power up and test the modified machine.
• 00:35:00 The YouTube user is experiencing problems with their TRS-80 Model 4P, specifically that pin 14 is not connecting to pin 12 as it should. After verifying the pin outs on the motherboard and the model 3's schematics, it is confirmed that the pinout on the motherboard matches that of the model 3. After plugging in the power and keyboard, it is found that the keyboard does not have a reset button and the drive is seeking activity. After resetting the 3-pin header, the drive is able to boot.
• 00:40:00 The video's subject is a TRS-80 Model 4P that is misbehaving. The user finds that the RGbt HDMI port is not decoding video, and that the problem is resolved when they replace the disc drive with a boot disk for the model 4.
• 00:45:00 The author of this YouTube video is having difficulty loading software onto his TRS-80 Model 4P computer. He suspects that the problem may be with the rgbt HDMI port, which has been malfunctioning recently. He plans to test the floppy drives to see if they are working. In the next video, he will test the power supply and the analog board on the machine.