|In that case, your problem is probably |
- the wiring between the base and the display is damaged, often right where it passes through the hinge
- and/or - the circuits in the display assembly are damaged.
You do not have the symptoms of a failing backlight or a failing voltage inverter that supplies high voltage to the backlight.
Your lines problem probably cannot be caused by software problems.
The wiring between the base and the LCD display is a frequently replaced item and relatively inexpensive to replace.
You could try that first.
If you're handy you could replace it yourself.
Local places authorized to work on HP/Compaq laptops may have it in stock. If not, they can look it up for you, or order it for you.
The complete display assembly is a lot more expensive. Local places usually don't have it in stock. If it was used in many models you may be able to buy it new for a reasonable price, or for less money a used refurbished unit (usually it's backlight has been replaced and in that case it will last as long as a new display).
If you're handy you could replace it yourself, but it's a more complicated task.
You may be able to find a used display unit that is not refurbished, or a laptop for parts, for less than the new or used refurbished display assembly costs, but then you're probably getting a display that will not last as long (the backlight has a definite limited lifespan).
Look on the HP site to see if there is a Maintenance manual available for your Compaq model or model series - usually there is.
Go here to look up the parts for your model:
Use your model to search with - you may need to use the specific product model number found on a label on the outside of the computer - it's probably on the bottom.
If you are able to look at both a Maintenance manual and the parts list, you should be able to figure out the part numbers of what you need.
You don't necessarily have to get the parts fron HP. Once you have found what part number you need, search the web and there are probably vendors that have it for less.