I only remember issues with caps, when pulsing often the 2 small ones in primary part of psu.
Did you check the diodes for DC on secondary side for shortage?
And did you try to warm the psu with a hairdryer? Caps get back part of capacity when you heat them up.
As far as I can remember...
For sony system, disk motor (does not rotate quick enough, needs about 500rpm) or laser pickup unit could be the problem.
Can you check the pickup type? Something like KSS-xxx or KSM-xxx. Often cheap clones are avaliable.
Second system maybe has an issue with pickup unit tracking. There are...
A one time blinking power led on panasonic led-tv's indicates a "BL_SOS" - set switches off after about 2 seconds.
Protect mode is activated if current for backlight is not within the specs.
You can check backlight with a service tool, e.g...
Changed the display in my R4 (and in a nivona coffee maker!) to a white one with SSD1305 - was mirrored as expected.
After that I used this NAND flash option:
https://www.alexej-krom.de/replacing-the-oled-ssd1303-display-with-ssd1305/
Maybe it will help somebody, even if the initial request...