Television my t.v. has a line on the screen,sometimes it goes away for couple hours then return for the past three months, but now it won't go away.

2007 sorry too many years with PLASMA older. my thought too much to repair.

Can be a problem with a misplaced connection, more likely the Ysus card to be replaced.

could be the power supply card(s) is unseated..open it up if you dare and re-seat and/or maybe remove and clean the card edge connector contacts with an eraser

take a rotary vacumm and make circles on screnn make sure tv on and vacumm, back up slowly making circles that take up the whole tv, repeat this s couple times, it goes away

I would have a tech come out and look at it. Sometimes the ribbon connectors from the upper or lower buffer boards have poor or corroded contacts. Should'nt be a major deal since it comes and goes.

All symptoms in your TV shows that you need to replace its Lamp as it has been consumed its life hours and TV requires new lamp. Lamp can be obtained from Sony Website. Price is $200, Hope this info will help you to enjoy your Sony TV in coming days.

canon ixus 500.
when i switch mode to playback/preview it doesnt work so i cant view pics that are taken or can i upload them to my pc.

shorted green cathode.

Had the same problem.  Was quoted $800 to fix.  Searched the internet for 6 months and found this thread on avforums.com

 

http://www.avforums.com/forums/showthread.php?t=462873&highlight=black+line+on+plasma&page=4

 

Read through all the posts.  Very simple fix, but you have to have some mechanical inclinations or you can cause more problems than you started with.  I was up to 5 of the black lines, but decided to attempt the soldering these guys did and fixed it all for the cost of a soldering iron!  Even if you decide not to attempt it, it gives you somewhere to start to tell a technician.

umm trying using it more, i had the same exact problem and we started using it more and more it has recently gone away.Check the wires as well (plug them out and back in)