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Missing colour channel

One RGB channel entirely absent from the picture.

4 repair logs

ZX Spectrum +2 dust cover with rainbow logo on black fabric, red trim visible along edge, placed on wooden surface.
+2 photos✓Successful repair

Sinclair — ZX Spectrum +2

Sinclair ZX Spectrum +2: RAM Chips & ULA Bridge Fix

Sinclair ZX Spectrum +2 (childhood computer) had dead memory chips and a colour issue from an unintentional solder bridge on the ULA. No thread of that repair exists unfortunately.

Missing colour channelCorrupted graphics
Nov 21, 20231 thread
Finger pointing to reflowed solder joint on Sony BVM neckboard, showing repaired connection that caused color loss.
+41 photos✓Successful repair

Sony — BVM-9045QD

Sony BVM-9045QD: Neckboard Joint Fix & Full Recap

Sony BVM-9045QD that arrived from Japan with an entire colour missing, the same broken neckboard solder joint that had plagued the PVM-14M4J. Full restoration followed: PSU, deflection board, colour board and anode cap all seen to.

Missing colour channelBulging capacitorsCold/dull solder joints
Jul 10, 20235 threads
Sony PVM-9040 CRT displaying color bars test pattern showing RED, GREEN, BLUE, and WHITE channels for diagnostics.
+45 photos✓Successful repair

Sony — PVM-9040

Sony PVM-9040 Triplets: Trim Pots Fix B&W Issue

Three 9-inch Sony PVM-9040s that arrived from Japan with customs drama. Monitors were fine inside, bar a known colour issue fixed by replacing the trim pots (which fixes the black-and-white-only fault). Full restoration across all three followed.

Missing colour channelCold/dull solder joints
Jun 22, 20236 threads
Sony PVM-14M4J displaying color bars test pattern showing red, green, and yellow bars with missing blue channel output during repair diagnostics.
+42 photos✓Successful repair

Sony — PVM-14M4J

Sony PVM-14M4J Trinitron: Retrace Lines & Colour Fix

Sony PVM-14M4J Trinitron with the common retrace lines issue, arrived with one colour completely missing. I made a mistake along the way but got there in the end. Trash to treasure.

Missing colour channelRetrace linesCold/dull solder joints
May 10, 20237 threads