laptop - Cannot enter BIOS due to broken screen
2014-07
gamer
Lately my laptop(hp g42 247sb) screen is damaged, so I hook it up with a external monitor(LG something) and it works fine now.
But the only annoying thing is I cannot navigate the BIOS menu for some tweaking because the BIOS not shown on the external monitor,instead, it only shown on the broken laptop screen, and it only output to my external monitor when windwos/os is loged-on.
So, is there anyway I can force output during BIOS/BOOT/POST to my external monitor?
Things I have done and didn't work:
(1)Set my LG monitor as primary display on both window properties and Intel Graphics panel
(2)Enter the bios (F10 key) and press the fn+F4 key(change display output).
(3)Disable and uninstall my internal screen(broken laptop screen) using device manager and restart, but windows(bios?) install it back on log-on.
(4)Closed lid/Magnet on sensor.
Please help me!
Langhard
Please try to close the lid right after you press the start button. This works on my HP 6730b here, i can see the BIOS then.
DaleSwanson
A closed lid should force the output to the external monitor.
Most laptops detect a closed lid with a magnet and a sensor. There is a small magnet probably somewhere on the top edge of the screen, and a sensor in the area of the body of the laptop that it would be near when closed. You can use a small refrigerator magnet placed on the sensor to trick the laptop into thinking it's always closed, while still having access to keyboard and buttons.
You can find the location of the magnet by either taking off the plastic cover on your screen, looking for disassembled pics online, or just moving a magnet over the outer edge where it likely is.
Hennes
According to page 38 of the manual you can switch screen output between the display devices with FnF4
I expect this also works for the output before POST has completed.
Poloboc
The LCD screen on my Toshiba Satellite A100-011 laptop suddenly went black. Since the backlight is still working, and I have image on an external monitor (see below), I'm assuming it is broken.
Meanwhile, I am unable to boot normally into Windows 7. The external monitor goes black right before the logon screen, when display drivers are loaded. To work around this issue, I renamed the Nvidia driver in C:\Windows\System32\drivers\nvlddmkm.sys from Safe Mode, and now the system boots normally, but with the generic display drivers.
What prevents me from booting normally with the external monitor using the Nvidia drivers?
Additional details:
- The internal display is always blank, it's almost sure it is faulty.
- The internal display is not detected, i.e. in "display settings" there is only one display, the external one
- I can't select VGA only output from BIOS, my only options for Power on display are "Auto" and "LCD+analogRGB" (which I think it means to power both displays)
- If I select "LCD+analogRGB" a weird thing happens: the BIOS gets shadowed by Windows! The first time I did it I freaked out since I couldn't access the BIOS any more; finally succeeded by mashing the F keys but don't know which one actually did the trick.
- I really need to load the normal drivers. The generic ones support only 16bit colors and prevent Windows from entering sleep mode!
- Graphics card: Nvidia GeForce 7600
Thanks.