My new monitor has a section consisting of 2 vertical lines about 3cm apart running from top to bottom - giving a 3-D effect of a vertical band. This appears in a different part of the screen with each logon but always the same width.
The monitor has not been dropped or subjected to any stress (only out of the box on Friday) and its twin in a dual monitor setup is fine.
The effect is very noticeable on a plain coloured background - not on white or multicoloured backgrounds.
any ideas on what could cause this and should it be returned to the manufacturer?
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Re: vertical band on new monitor
Without a second thought, send it back.
When you say the monitor has not be dropped, wht you are really saying is it has not been dropped by you.
There were alot of hands involved in getting it from the production line to your house.
At any stage it could have been dropped or given some form of impact (normally in transit)
That fault is in the panel itself and cannot be fixed.
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This appears to be a common complaint on LCD monitors. Some LCD screens have control issues. An LCD screen is the panel and a bunch of Line control chips wrapped around the outer edge. A problem with one line top to bottom or left to right is almost ALWAYS the LCD panel itself. A problem with a fixed band (The band is in the same place at any resolution) is often the LCD but might be the signal driver chip (A large plastic pack with about 100+ leads). A person with a VERY small soldering iron might be able to resolder it, but they MUST know what they are doing. (board must be heated, lead free solder, eye like an eagle...) If the band moves around or changes width, it is the signal chip or the power supply to it from the power board. It can be software if there is a firmware upgrade. This takes a shop.
It is the problem of monitor pcb in vertical section.check vertical ic for dry soldring. Resolder the ic if problem still on then change ic or check components related ith it. check continuity of vertical deflection coil.
Hope this be of initial help/idea. Pls post back as requested, how things turned up or should you need additional information.
Good luck and kind regards.
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This is due to vertical section failure. Change the vertical supply rectifier diode and supply filters. Then check zener diode leakage in pumpup circuit section. Also check any electrolytic capacitors leakage in vertical section. If it is old model tv change vertical height, vertical lenearity presets also. I hope given details useful to you.