HI. the backlight on my HP paviilion has gone again.Last time i had a failure it started working again after a month of nothing, used external monitor that time. This time, for some reason it wont let me use the ext mon as primary, which would be fine.So my question is; why would it stop working,then start again work fine for some months and then quit again? and how could i get the external as primary? thanks in advance for any help.
I'm not sure but think there might be an issue with Vista and the display, surrounding sleep/hibernation
Returned the PC to HP and they replaced the inverter and updated the bios, which worked for a day or two and then the problem reoccured.
A few days later started it and it worked okay, until I closed the lid, which should have done nothing (as per vista control-panel settings), but obviously did because the screen has gone very dark again, I guess indicating that vista is not sending power to the inverter/backlight?
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Re: faulty backlight hp laptop
Well, first off, do you get a screen (external or onboard) if you boot into the bios? If you have no video whatsoever, the only thing that would start working again after time off, then stop, would be the video module went. slowly, but it went.
Main cause is overheating, caused by the heatsink/fan becoming clogged up.
What makes you think the backlight was the problem BTW? Sure it wasn't just the inverter?
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I find sleep mode nothing but trouble, eventually corrupts window files over extended use, go into power options, go to stand by and select never and click apply, next go to hibernate "top right" and click, make sure the check box is clear, if not! remove check and click apply and restart your laptop.
no laptop stated ok W7 OS, nice to know.
nor external model screen stated
try a different external screen
any shop can fix it, ask them
no need to ship anything
get it checked out by a technician
we can test all 3 parts and tell you whats worn i minutes.
i can not understand your post
try to be more clear
does local LT screen work ok
does using a known directly connected screen (VGA)
on the LT you must turn on external screen using the fn hot key
the the external works,. do so, now
if both internal and external fail the LT is bad, guess, bad GPU chip
if only external fails, try a known working external screen
if that works your external is bad.
the docking is last, and if only it fails, then ITS BAD.
you connect the external monitor & nothing is displayed on it, then
this means that both the backlight lamp & the inverter board are
fine. The main indicators in these cases are the sound, and the hard
drive LED on the laptop case. If the laptop sounds just like it always
does for a minute or two after being turned on, it means it's going
ahead and booting the operating system, but the video processor or part
of the motherboard circuit for video output has failed. If the laptop
just sits there and beeps when you turn it on, or if you hear the fan
but not the hard drive chuckling with its active LED flashing away, it
means the laptop isn't getting as far as trying to boot the operating
system. While this could be due to any number of hardware problems, the
most common and easiest to troubleshoot or repair is RAM failure. If
your laptop has two RAM modules installed, try booting with just one
and then the other in the primary slot. If your laptop only has one RAM
module, you might consider buying one online from a site with a good
memory selector, like Crucial.com
I am afraid it that the backlighting has gone out. It will probably need repair. Find a local computer repair (always check for three and get three estimates). Unless, of course it's still under the one-year warranty.
The lid actuator switch may not be working correctly. It's a small switch above the keyboard and led's on either the right or left side. Try pressing it 2 or 3 times to see if the display starts working correctly again. If so, it will need to be replaced.
If that doesn't work, you can also turn it on with the ac adapter plugged in. After it boots, press the power button and hold it in until it shuts off and then turn it on again and see if the display has returned to normal.
If neither of these options work, your laptop may need to have the backlight replaced.
try removing the battery and switch on your notebook using the ac adapter only if it works then i think you need a replacement for the battery or you can try to power cycle your notebook i hope it applies to hp notebooks coz it works all the time with dell vostro. to power cycle: unplug/remove ac adapter, battery, usb devices (mp3, ipod, printers, etc) optical drive, network cable then press and hold the power button not less than 10 seconds then put everything back except for the usb devices and network cable if it works then you can plug everything back again.
Hello jarkk, I believe your problem is with your backlight inverter. the hard drive should be installed for this process of checking it on an external monitor. with the hard drive removed it will not boot to the operating system. with the drive in, use the external monitor. if the monitor works when plugged into the external monitor plug, this will eliminate a bad video card. if the screen is still black on the laptop screen, replace your backlight inverter. the last case cenario is to make sure your backlights are not burnt out.
i 100% agree with you. i found out that my notebook is one of the recall product from HP. I sent it in for service. A week after the repair, the same problem is back again. So I call HP and they said that I have water damage on the board. I am 100% sure the notebook is no where need any liquid at all time. So they tell me if I want, they can fix it for me for $375. I would highly recommend everyone not to buy HP products!!!!!!!!!!!!!!!!!! I always have problem with HP products and I think they have the worst customer service of all. Once again, do not buy HP products!!!!
Actually, there's 3 major manufacturers of laptops and parts.
Can you connect to an external monitor and boot the unit up. You may have to toggle (F3 or F5 i think) between on board and external a few times. If you get an image on the external, it's probly the lcd inverter (#1), or the backlight (#2), or the cable is not completely connected to the lcd (#3)
Let me know how the external monitor test works and we'll narrow it down from there.
Can you try booting to an external screen? If it works with an external screen, sounds like either the inverter (probable) or the backlight has gone out. If there's no image on the external screen, it could be any of several things, the most likely of which is the video module.
Sounds like you got a lemon. The DV series have been good sellers, and mostly good units.