My picture is a bunch of horizontal grey lines up

Either the screen voltage to picture tube is more than normal, or the video processor IC has damaged. There is an other possibility that there is no voltage at the video output card, plugged on to the neck of the picture tube. Anyway, your set need a through checkup, and the work is somewhat skilled one. Just check this site. Soemtimes you might get some details about this fault. The fault is called vertical retrace lines. Thin horizontal lines all across the screen with an inch apart. One among the posts published in the following site have details about this fault.
Visit the site named 'Electro-help' for more details. Click this link. View it in "Timeslide" or "Flipcard" option, which can be selected from the drop down box menu by the [Sidebar] tag, at the top left corner of the display window. It will make search easy. There are more than 1250 posts to different brand TVs now. Pull up older posts there.

The problem is vertical failure. Vertical output section to your TV ahs the fault. You ahve to check the vertcial output circuit for any component failure or loose solderings.

See this link.

Its symptoms of dirty / clogged video head. Please use Sony video head cleaning tape to clean video head.

try your monitor to other computer or try other monitor to your computer to see where is the problem

the problem there is a loose connection on the board,you said that you smacked the right side of the tv and it goes normal.there are parts that should be resolder on the board in order to back into normal operation.

yOU ARE HAVING A PROBLEM IN HORIZONTAL CIRCUIT OR IN YOUR POWER SUPPLY kindlyu take your T.V tO A QUALIFIED TECH to repair it.ypur problem could be a faulty capacitor ,flyback or horizontal output transistor.

It's a long shot, but you could try unplugging the set for about a minute. Philips is among my least favorite sets to repair, and with it being a 25" model it probably wouldn't be worth taking to a repair shop if the power interruption doesn't reset it.

Sound like you have to turn down the G2 (screen)controls. They are turned up too high.

adjust your screen at the back of tv flyback down you see the fucos and screen adjust the sreen ok