Problems with Philips Magnavox 20MS233S 20'' TV?

Hi and welcome to FixYa,

Offhand your described problem could be:

• top and/or bottom - vertical deflection, most likely a failing capacitor or the Vertical IC. In some instances, it could just be a cold solder on any of the IC's pins;
• all 4 sides - likely to be a main B+ issue. Often, this would be the main filter capacitor. In some instances, this could be a failing component in the horizontal section.

This would require opening the unit. This of course would require a fair familiarity of electronic components/circuitry and safety procedures, use of a DVM and a soldering iron. It would be to your added advantage access to a service manual or at the very least a schematic diagram with voltage readings. Should you be uncomfortable performing a DIY (do-it-yourself), perhaps your best bet would then be to seek the services of a qualified professional.

Just a start, do postback how things turned up or should you need additional information. Good luck and Thank you for using FixYa.