Worst case scenario is, you're out $20-30. Since the inverter is cheaper and easier to replace, I'd suggest starting with that. If you're unable to determine which part is faulty, then you'll just have to replace one or the other and see if it helps. For more info about resolving system update issues. If the webcam works in Safe Mode, a startup program is a likely culprit. If youve just installed a system update and you see a blank screen, it could indicate a system update error. If you open your webcam in Safe Mode and it still displays a black screen, try updating its drivers. Note that this isn't 100% certain, though. If the camera still doesn't work, try plugging it into a different USB port and giving it another shot. If gradually, then it's probably the backlight if suddenly, then the inverter. If that's not an option, then one thing that can point towards the more likely culprit is whether the problem started suddenly or gradually. You can also try hitting F2, F9, F10 and Enter while you’re powering up after you see the Acer logo/splash screen. Reboot your laptop and you should regain functionality to your GUI. Since you replaced the video cable, AND you can output to a different screen there are only two things it could be: 1) LCD screen, or 2) Problem on. While your laptop is connected via the AC adapter and the battery in its slot, powered up with the black screen, press F2, F9, F10 and Enter. The LCD screen is controlled via the video cable. This light shines through the LCD screen which then filters which light passes through. Also, the frequency of the alternating current that the inverter produces (usually around 30 kHz) is probably out of range for most hobbyist multimeters. The inverter is for supplying power to the backlight. Since the voltages involved can be in excess of 500 V, this is something best left to a professional. The best way to tell for sure which one needs replacing is to check the inverter output to make sure it passes power. If the cables seem fine, then you're looking at either a faulty inverter or a dead backlight. You could also try wiggling them where they pass through the display hinge - if that causes the backlight to flicker, it means the cable has been damaged. Make sure they're properly seated in their connectors. The first thing I'd try is disassemble the laptop (see here for the service manual) and check the cables between the motherboard, inverter and LCD. Or possibly one of the cables running through the display hinge has become damaged. I can see a trend but maybe I'm just overlooking things.If you can see a faint picture on the LCD with the help of an external light (like you described), then that means that either the backlight or the inverter has failed. Gpus built in and upgrade required by Microsoft. Seen this happen to a lot of laptops which upgraded from windows 7 8 8.1 to 10. My issue started when I upgraded to Windows 10 which is another problem in itself. I paid £600 pounds and just over 3 years this problem acured where as I have a old Dell laptop from 2006 which still runs. There are bumps Inside the chips which become faulty due to thermal stress due to the fan not cooling gpu properly.Īny how I would love to have some sort of protest against lenovo and all other manufacturers who have embedded chips on the motherboard as when they go wrong you have to replace the whole motherboard where as on old laptops you can simply just swap out the gpu aka graphics card. Reason why this happens is the chip design is a flip chip type. Here is a link to how to fix the problem but it's just a temp fix. I will try fixing laptop by taking it apart and heating the gpu and once that's done it's up for sale. There isnt really one specific pattern I can pinpoint but here and there say if a user is working on their laptop, closes it up to bring to a meeting and goes to open it, sometimes the keyboard lights will still be on and active but nothing will display on the screen. My old HTC hero is more reliable than these new laptops. This has been an ongoing issue for our Surface Book 2s for the past few years. I will be going back to desktop as all manufacturers are building laptops with built in gpu just so when they go wrong you have to replace laptop. I would advise everyone to stay away from laptops with built in cpu and gpu as they will go wrong which means either get a new motherboard which are not available or buy a new laptop. Many new laptops come with built in gpu which is a pain because when they go wrong you can't change them so you have to basically replace your laptop. The other issue is you cannot replace the gpu as it is built in. You can open laptop up and heat the gpu which will get it working but how long it will keep working for is like saying how long is a piece of string. Issue is with the gpu aka graphics card which is on its way out.
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