Philips TV 21PT128A/71R: Irregular picture size & shape problem

A TV repair problem that I had recently encountered is with a Philips 21PT128A/71R which exhibited irregular picture size and shape.

TV troubles like this usually indicates a problem with filter capacitors so I visually checked electrolytic capacitors on the main PCB.
One electrolytic capacitor on board location C2453 looked suspicious with its slightly bulging top. Checking the part using a capacitance meter, it read 3 microfarad instead of its indicated value of 680uF/35V.
 I replaced the capacitor with an available part on hand with a value of 1000uF/50V which restored normal size and shape to the picture.
The capacitor is a filter for the +25V scan-derived supply from the flyback transformer.

Philips CTV 29PT2252/56A (L01.1A chassis)problem:intermittent pincushion distortion

This Philips TV model# 29PT2252/56A exhibited intermittent increase in picture width with pincushion distortion and blanking of picture.
A visual inspection of the printed circuit board reveals solder crack on pin 1 of pincushion transformer on board location 5465/5464/5463.
Resoldering of the cold solder on the pincushion transformer solved the problem of  intermittent picture width and pincushion distortion.

Philips TV Service Mode

To access service mode in a Philips TV, press on the remote control keys:
0-6-2-5-9-6-OSD(i+) or
0-6-2-5-9-6-MENU.

The service mode will allow you to adjust picture Geometry and White Tone via remote.

You can also adjust the option codes to configure drivers for the hardware components particularly the I2C devices..