I have a Sony camera dsr250p When I play the tape Silver lines on the LCD shows

clean the heads of your video camera buddy !! use a cotton bud tip, with a touch (NOT SATURATED) of turps......an LCD screen cannot show bad tape speckle or white noise like the old vhs on a tv tube used too....remember when an old VHS Tape needed tracking?...thats what your camera is trying to tell you....but....it needs a clean as the LCD screen cannot show fuzz.....and waits for a good frame to display.....CLEAN THE VIDEO DRUM MATE !!

Your drum{video head} is dirty it needs a service

Is it the Viewfinder or LCD that does not display an image?
Try hooking the camera to a TV to confirm.

The playback head is probably dirty and cannot show the picture - the screen is blue. Run a blank tape in the tape drive and execute a record all the way through the tape. Then play back a pre-recorded tape to verify it plays back ok.

either the tape or the recording head is dirty. use a new tape. if the lines are still there, get a head cleaner tape or use alcohol to clean the recording head.

It could need a head adjustment. Any camera store can do that for you.

Clean the heads(use the specified cleaning tape sparingly).
Change tape. Using Panasonic video tape? It sounds like no. You might get by with Sony... Try Panasonic.
The tapes are different thickness, durability and therefore suitability for cameras. Try to get ME -type tape( metal evaporated) instead of MP( metal particle) as the particles tend to flake off more readily. The blue often means no signal(video) was recorded in that space(on the tape). Let me know it it helps.

vac8

Seems video head of your handy-cam is dirty or clogged. Use good quality video head cleaning tape to clean video head.

There you go. Thats a good way to get the problem solved.

if your . . . remote . . . works ok ? your touchscreen internal connector could be loose disconnected - or defective ( not field repairable ) ;