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SOURCE: Half the screen has gone black
Ok first lets start with the half screen and no lit screen . Samsung plasma panels (S42AX-YD01) HD V4. are really bad about the Y-board (upper,lower) buffers are really bad about getting hot and burining up. If u remove the back cover of TV u will see on the left side the Y-board (it will be marked in small letters) if u look and the rows of IC's with heatsinks on the buffers will be a dark yellow. Majority of the time if u remove the buffers. and look underneath them u will see the solder has melted from the board. U can replace the Y-board and buffers and the TV will work fine.
Next part if u have vertical lines in the panel. There is not much u can do as a repair. Only thing u can do is get panel replaced. because there is and IC that is burned up on the panel, and trust me there isn't anything u can do to fix it. If u want to see for yourself. After removing the back cover, remove SSB, and brackets holding PDP in place. at the bottom of TV there is a row of buffers marked E,F,G, ( i think) there is a long heat sink covering the IC's at the bottom connected to the bottom of PDP. As u can see without a $70k machine to change this there is not much u can do with it. Hope this helps.
SOURCE: Black screen after BIOS update
better flash the bios again, this time try a different version of the bios. but, if it wont boot from the new bios flash disk, then u just turned your computer into a paper weight.
SOURCE: connection?
check the videocard. remove it and place it again if no improvement try to connect monitor to another system. If no color, replace monitor.
SOURCE: I have a Samsung M/N: LN40A500T1F. After about a
Sounds like a leaky capacitor ( when it heats up it leaks ) causing what is called frame fold over. You could check for swelled capacitors , ( BUT SOMETIME THEY DONT SHOW). Otherwise phone tv repair man,
pete
Tweaking the brightness settings on your iPod touch saves your eyes from unnecessary strain.
Changing the brightness settings can be done quickly if you're on the go.
Adjusting the brightness of the screen can make the device brighter if you're in a dark environment or darker if you're in a bright environment.
Alternatively, you can set the device to automatically adjust to the level of brightness it's exposed to.
Press the "Home" button to return to your iPod touch's home screen.
Tap the "Settings" app.
Tap "Brightness." A scroll bar appears at the top of the screen.
Press and hold your finger against the circle on the scroll bar.
Drag your finger to the right to brighten the screen and to the left to darken the screen.
The screen's brightness will change as you move the circle.
Alternatively, tap the ON/OFF toggle to the right of Auto-Brightness to have the device automatically adjust itself based on the detected brightness level.
Tap the "Home" button just beneath the iPod touch home screen to save your changes and return to the device's home screen.
if this is not or cant fix the problem you might have restore it to factory settings
You can use iTunes to restore iPod Touch software.
Apple recommends using the latest version of iTunes to complete this process.
Follow these steps to get the latest version of iTunes and restore your iPod Touch software.
Back up your iPod Touch's data to your computer before the restore to prevent losing data.
You'll need to reinstall it after the restore process.
Connect to the Internet and install the latest version of iTunes from the Apple website.
Make sure your iPod Touch is connected to your computer.
Pick "iPod Touch" in the Source pane of the iTunes program.
Click on the Summary tab.
Choose "Check for Update."
Select "Restore" and follow the instructions to finish restoring your iPod Touch.
although it does sound like a hardware problem with the ribbon cable leads so if this fails and you are tech savy you could try to open it up and to have a look
hope this helps
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