Question about BenQ Joybook R45 Notebook

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LCD Blank but if i use external monitor is not blank

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Your display is either disconnected or loose at the motherboard or the screen needs to be replaced.

Posted on Aug 10, 2010

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Posted on Jan 02, 2017

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Overheated chipset/VPU. It needs resoldering.

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HP Pavillion 500series to Panasonic TV with DMI port, hooked the HDMI cable from it to the tv, blank screen, made sure the tv was on HDMI, blank screen, unhooked the monitor, blank screen, hooked the...


Most laptops have a "toggle":
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Set the "toggle" to the best value.

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Toshiba screen is blank ans light on under F10 key.


Is the screen completely blank, or just dim? If it is dim, then most likely your lcd power inverter is bad, and needs to be replaced, which is the cheapest part to replace. If it is completely blank then you should try to hook up an external monitor to the laptop, and don't get any video, then most likely there is an issue with your motherboard or video card. The external monitor method sometimes needs you to press a combination of the Fn key and another F key in order to switch from your laptop lcd to an external monitor.

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Va912b first cuts on with mostly blank but with broken strips of lines from top to bottom and have some together and some with blank seperation between them. then goes blank


joaye, First place to look would be the monitor's "switch-mode-power-supply" and /or the INVERTER circuit. When strange things start to occur with LCD monitor's w/CCFL backlighting, the first place to look would be the internal or external SMPS for the unit. You should be careful in your third use of the word "BLANK". Some monitors will be BLACK and not BLANK! Some will be both BLACK and BLANK. Read more Black screen stuff in my profile and you will understand WHY your unit is behaving like it is and some useful options you and other's like you have. Also visit www.ccl-la.com/badcaps.htm and www.lcdparts.com or YOUTUBE for videos on lcd repair or lcd monitor disassembly FYI DIY type stuff. I'm 12fixlouie on fixya.

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Laptop screen partially blank


Generally, the LCD is a pass or Fail device, with a few exceptions. You can try reseating the LCD cable to the video card and see if that makes any difference in the display.

If video looks normal on an external monitor, then LCD replacement is in order (Arround $200 to 400 depending on display) if issue is the same on external monitor then the video card is failing

Dec 21, 2008 | HP Compaq nc6000 Notebook

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Monitor and LCD detection problem on HP DV6000


I HAD SIMLAR PROBLEM WITH ANOTHER MODEL TURNED OUT TO BE THE LID SWITCH WAS STICKING HOPE THIS WILL HELP

Dec 07, 2008 | HP Pavilion dv6000z Notebook

1 Answer

Satellite 1115 blank screen at start up.


Try using an external monitor. If an external monitor works then the issue may be backlight if not then the issue is the LCD screen. the way to test that is after you have used an external monitor to verufy booting and the the system works. then if the machine is out of warranty you remove the bezel anf the screws holding the lcd in place. lean the lcd forward. with a flash light on turn your system on and flash the light through the display if you see your post and or windows with the flashlight then the baclight is bad. if not lcd is bad. If you can not get teh external monitor to work, then your motherboard is bad or graphics card.

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Blank white monitor


mostly the problem is cause by loose flex cable only connected to your lcd panel board. check if it mounted properly, otherwise the lcd panel board may be defective.

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1 Answer

Blank screen


If your LCD is on but blank then it means its not compatible with the picture being send from the CPU VGA unless its faulty itself.

  1. Try reducing your Computer display setting to those specified as native or default setting of your monitor. Offcoz to do this you ned another monitor preferably external. Boot up your machine with an external monitor connected if it lights up the external monitor then go to your desktop (if using windows) right click select properties and goto settings and reduce the VGA card setting to those of your LCD or just lower settings. and then restart your computer without the extrernal monitor.
  2. If it does lughts up your External monitor but does not light up your LCD on rebooting then its possibly that your video cable to the LCD is broken and needs replacement or that your assuming you saying that it powers up
  3. If it fails to light up the external monitor as well then if means your VGA card is not working (assuming you used modern CRT monitor to test it). If its up to the third option you need to replace your VGA card assuming its not onboard for a laptop. If its onboard please check if your machine is working or running properly when your machine is not diplaying like making windows welcome sounds etc cause it might be just your RAM that needs replacement
P.S. Try to give more details when you ask to make your questions easier to answer and answers more helpful

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I think your LCD is stuffed is it under warranty do you know BUT if the screen is cracked they wont replace it typical HP. To get your external monitor running hold down the function key and the blue monitor looking key similtaneously normally on compaq its the F4 key but look around your keyboard (looks like a monitor) and is blue letters.

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