freejazz said:
Hi, i have a Hp G62 notebook since 2010 with Win7 installed but
lately the screen shows sometimes some lines and sometimes
switchs off the screen even the system is working...
Sometimes appears the blue screen with some errors about video card.
Now i have scanned for possibly malwares but now i think that is
cleaned.
What do you think?
Is hardware or software issue?
Need i format the system to exclude if is a software/driver issue?
If is a hardware issue how can i solve it?
Can you help me?
This sounds like more than one hardware issue.
1) "Lines" on the screen, can be a failure of a driver in the
LCD panel hardware. Typically vertical lines of one color show
up. If the lines are of other description than that, they could be
caused by a failing GPU.
2) "Screen switches off" could be the power source (inverter)
for the CCFL backlight. The inverter board is a narrow strip.
If the screen is brownish (off-color), that could be the CCFL
itself which is worn out, but your laptop isn't old enough for
that to have happened. So it could be an inverter board.
3) "Errors about video card", could be a GPU problem as well.
A common element to all hardware problems, is internal power
distribution. The battery provides a relatively high voltage
(maybe 14V or so), and switching regulator circuits make power
for other systems inside the laptop. But it's unlikely though,
for the inverter to be switching off because of that, because
other things would likely quit first.
The nearest single problem, is GPU failure. But the GPU may
be integrated into the processor, so it's not like in previous
generations, where an NVidia GPU had a cracked solder ball. I've
never heard of a GPU failing, of the type that is inside
the processor itself. It could be, that even re-seating
the processor in the processor socket, may be enough to temporarily
fix it.
So the symptoms are very puzzling.
Paul
