How do i format my philips 40

A whole lot of problems stem from the Power Supply , that is the heart of the TV. since the cost of a power supply is not that much money. I would start with replacing the power supply. Look at your power supply and see if you can spot some Cap that have swollen tops. A power supply usually fixes the TV's I have worked on lately.. Hope this helps some...

Possible this can be fixed with a professional alignment as the adjustment of the convergence is distorted and so needs a setting.
The Keystone correction and focus must be adjusted.
check this link for tips:

http://htrgroup.com/main.php?section=keystone

a part called picture tube base which connects picture tube to circuit board got some trouble,,, u can replace it with the help of a service pro..

The convergence output IC's need to be changed. A very common problem with all projection tvs.

If you wish to get some details; visit the site linked here. Pull up older posts.
https://electronicshelponline.blogspot.com/
faults & possible causes to LCD & Plasma screen are given with illustrations. You can get an idea about the fault to an extent. Faults to all LCD & Plasma screen are similar, irrespective of its brand and screen size.
Search the site by type in the "BRAND NAME" of your device; (Exclude the model number), in the "Search box at the top right of the display window of the Homepage" to get gathered related posts

I have 50" philips magnavox big screen. I recently started to have a problem with the edges of my tv. They became blurry. the center of the tv is clear and the edges are blurry. what should I do to fix this problem.

on your remote push the arrow key to the right or left side. this should change format and go into customer setup and turn of autoformat

ok you have to open the tv intill you see the 3 bulbs and the big mirror
the around each bulb is a wheel u have to turn that for the pic and focus

hi, what you need to do is adjust the screen size to wide it might be on auto so if you know how to do this then have a try ill look for your manual now and tell you how to do this incase you cant do it ok just bare with me few minutes ok

Sounds like theres a leaky capacitor in the screen drive circuit. I have seen this problem also be a gassy crt but was able to clean off the grids of the CRT with a crt/rejuvinator. It happens because of low emmissions in the tube and when white is on thats a mix of all the colors, so the tube works harder. I bet when you whatch a movie and the scene changes suddenly to a white or brite scene the pic looks a little washed out. If this is not the case then I aggree with the Pravin and try it on another TV just to be sure .. This is not a repair for a consumer to do, though however it is only a three year old set you stated, so there should be life left in the tube, so im kinda thinking a capacitor is bad. Seek out a yechnician to check this out for you as a TV is not a place to see it you can fix it or to exoeeriment with. Good Luck