Just recently (starting today) my computer is not displaying anything on the monitor when I turn it on. I press the power button, it makes a few knocking sounds (this has always happened when I turn on the computer), the lights turn on, but nothing is displayed on the screen. I tried pressing the Fn button while I turned it on, and it worked for the Dell start-up page, but come the Windows start-up, it went black again. The Fn button did not work after the first time. Is there anything else I can try to get the display working?
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Re: Laptop won't boot (display problems)
If the diagnostics displays on the LCD screen but you get no display when Windows starts to load, it sounds like you have a video software driver problem. Try tapping the F8 key when you power on your laptop and boot in Safe mode. If it works in safe mode then you need to check you driver. You can also try connecting the laptop to an eternal monitor and see what happens.
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I would try booting the computer up and press F8 and select VGA mode. From here, you can check your video settings and make sure the screen refresh rate isn't set incorrectly and make sure the resolution is correct. After that, reboot your computer and see if video will display in regular windows mode now.
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Make sure that you have the video cable connected properly and tightly to the computer. You might also want to try pressing the auto adjust button on your monitor. It may have been manually set to another display mode by accident.
If the computer starting up and Windows is running properly but the screen is black (or the desktop is barely visible if you look at the screen closely), the backlight inverter circuit is probably to blame. This provides power for the display's backlight, and without the light you can't see the display even though it is working properly.
Fortunately, replacing the inverter in most laptops is pretty easy. Replacement parts and how-to information for many brands and models can be found online. Just search for "replacement inverter" for your brand and model and you should find several sources. A good place to find vendors today is eBay.
Replacing the inverter typically involves only a few steps. You remove a few screws to open the display. The inverter is usually a small board at the bottom of the display, held in by a couple of screws. Unplug a couple of cables, take out the old board. Then put the new one, reassemble the display and you should be back in business.
On the other hand, if the power light comes on when you press the button but the computer isn't starting up to Windows, there's some other issue that needs to be fixed. Connect an external monitor to your computer to verify it's really starting up (unless you are hearing the normal startup sound through the speakers). If an external monitor shows everything else is good, replace the inverter. Otherwise you'll need to see why your computer isn't starting.
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Hi! Most modern monitors have on/off switches that are NOT actual power controlling devices. (i.e. they simply tell an IC chip to cut power to the display section while leaving the rest of the power supply energized.) In the earlier monitors, when you flipped that power switch, you actually cut AC power to the whole unit. Now, with today's faster computers, LCD and plasma displays, instant-on is the norm. Regardless if the button is physically damaged(usually pressed too hard) or the circuit is defective, unless you are a tech you'll have to take the unit in for repair. Is the monitor under any type of warranty? Was there a storm recently? Do you use a surge protector? If the display was damaged at all by the storm, there is a very good chance you'll be covered by the surge protector warranty.(that's what you paid for)---hope I was of assistance---Rick
warcryofjuda, One of the guys that I work with brought in a small screen Sceptre DTV/DVI/VGA +audio unit. and it also has a optional TV/tuner module. mod S1701DTV with side mounted speakers. The viewable screen size is 14"w x 8.75"h . Oh! First things first! Turn it OFF and leave it off. Disconnect it and put it in a safe place for now. IT'S BROKE!! It will not work today, and it will not work tomorrow or the next day. Got that? Ok! Now I want to know if you would like to work together with me and explore both of these monitors and possibly come up with a fix for them? Please get back to me via my email with what ever approach you feel is best for you. We have already opened up our unit and I will try to attach some pic's for you to compare your unit with. I'm louie12fix on fixya or email@example.com
Bye for now.
Are you familiar with Windows' "Power Options" module, and that within it you can tweak all things related to power saving (e.g., system sleep, hibernate, and automatic MONITOR shut off)? More than likely you just need to make a visit there and make some desired adjustments.
[Control Panel > Power Options]
... OR ...
Start > Run > type "powercfg.cpl" (without quotes), then hit Enter.
Once there, you'll probably find most everything self-explanatory.
Also, it may be responding to configurations adjustable from within the monitor itself. Somewhere on the monitor there will be a OSD (On Screen Display / Setup) button of some type, where from there you'll be able to make whatever necessary tweaks. Refer to its documentation if you don't find it self-explanatory.
Good luck and please let me know if you have any further questions, and/or just to let me know how things worked out.
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I didn't have the monitor connected to the computer, and that's why the power button was unresponsive. After connecting it, the solution above worked for me.(My KVM switch was set to a computer that was turned off)
Firstly check the connecting cable from the screen to the computer at both ends. Ensure that the thumbscrews that keep the connector in place are tight. Has the PC been moved recently? Any chance the cable could have been put in the wrong place?
You can get the installation manual on the following link to see where that cables should go:
Try resetting the monitor by pressing the "Auto/SET" button on the front panel for a few seconds with the PC on.
If that fails you can do a full factory reset on the monitor by using the on screen menu and navigation to the "reset" function on the setings (gearwheel) page. This is described in the manual page A12.
If all this fails then disconnect the cable to the monitor, the monitor should display "no input signal" if it does suspect the PC graphics card is faulty.