A few days ago a tiny black box appeared in the upper left corner of my monitor screen screen. i have an hp d6v laptop. sometimes there are double green lines inside this tiny box which flutter and look like some sort of cpu warning. What is this and what should I do to stop it or fix it? Thank you so much!!! :)

SOURCE: Sony KP-57WS500

the unit needs the convergence ic's replaced and probably a couple of safety resistors.average repaire are about 300 from a tv shop

SOURCE: Video Source Text remains in upper left corner of screen (video 1, video 2, etc)

If you have the original remote control, press display to get rid of it.
Hope it works.

SOURCE: tv has double image color red and a curl line on left upper corne

This sounds like a problem with "convergence" of the TV. Convergence is the electronic aiming of the Red, Blue & Green projectors. Typical convergence problems look like double or triple images on part or all of the screen, wavy lines, curled edges, excessive red, green or blue color or tint, etc. Sometimes, convergence issues can be corrected in a menu setting of the TV that has to do with "Picture Settings" or "Advanced Settings".

If the colors are out of alignment a great deal or went out "all of a sudden" it will probably not be repairable via the menu adjustment described above - but is certainly worth trying.

If it does not straighten out with the menu adjustment, it will probably require replacement of the convergence integrated circuit(s) chips located in the TV. This was a big ticket repair years ago, but can be done sometimes for as little as $40 in parts. Don't let the low price fool you though.. It can easily take several hours (or more!) to access, remove & replace the components and reassemble the TV. Soldering skills are a must - and I'm not talking about soldering plumbing pipes here either. These are delicate electronic parts and need a 15 - 30 watt soldering iron and desoldering braid or solder ****** and LOTS of patience to perform CORRECTLY. As such, it is another "not a DIY project" unless you're willing to turn your TV into a large floor model paper weight. If you decide to attempt this repair, you should google your TV brand and model along with the term "convergence". Parts, costs and procedures vary by TV. Unplug the TV for a day or so before starting the work to let capacitors discharge fully - just to be safe. Lastly - don't forget the heat sink compound - it is an absolute *must*!

SOURCE: A black _ in the upper left hand corner (size of underscore)

It is what we call a "Shatted Pixel" and you can fix it by flashing your screen

SOURCE: Could my laptop screen be leaking?

Agree but if you don't mind the black spot keep it. Replacing the LCD is not difficult as long as you have the patience and small screw drivers and you need an assistant to hold the LCD while installing it/
Also buy anti-static gloves from an electronic store