TV turns off-on when I try to adjust the volume

Convergence is the alignment of the red, green and blue lines to produce a white line when doing a convergence setup. You need the correct remote to do that. Support for KP 53V90 Sony

remove batteries from remote control and adjust volume to desired level. If the volume stays the same then there is a problem with the remote. If the volume lowers again then the problem is with the TV. the volume button on the TV or on the remote may be malfunctioning. Hopefully it will be on the remote. If it is the remote, take it apart and clean it with damp cloth. after allowing it to dry, re-assemble and try it out.

This is probably the notorious "light engine" problem that all of these Sonys of this design run into sooner or later. It is usually more expensive to repair that what the TV is worth, sadly. A Sony authorized repair center can confirm this.

The tv have a problem known as a convergence problems,it dead.The tv convergence board require changing 2 STK convergence ICS and some or all it resistors to solved the convergence problems.The shop will cost u $300-350 for parts and labors.

This is a good one. Your TV "looks" at the feedback coming from each picture tube in your TV. When it doesn't see what it expects, it kicks out a 5 flash. Most commonly, the correct signals never got to the picture tube(s) and that's why the feedback was abnormal. Which brings us to the most common solution: C boards, they attach directly to the bottom of the picture tubes. Figuring out which one has a problem... that's another matter. Due to the age of the TV, parts costs are rising. Each C board (3 in the TV) runs about $100 so guess work can be expensive. I hope this was helpful.

take off the back of the tv and clean the lenses and the foggy picture will go away

i have a sony rear projection TV, model number kp43t70 screen went black and there was still volume but no pic so I turned it off and now won't turn back on

Hi,
In Sony KP-53V90 TV, Remote Sensor (IR) is located in HC board and an exploded view is pasted here for reference.

Hmm. you should return the tv where you bought it. by the way how old is your tv?

EIGHT Blinks---Problem with the audio (AUDIO), unit goes to standby and
blinks the self-diagnosis code. Check IC406 audio amp, PS401 and 402.