The lid close button appears to be working OK. Also the Fn + F5 function is now closing/opening the external monitor, but nothing appears on the laptop screen other than a very faint image.

The low voltages through the inverter connection looks to be the problem, which I believe indicates that the motherboard is the cause

I think you are correct. Sounds like a problem with the motherboard. Probably not worth repair.

Thanks for your suggestion under post 89. The lid close button appears to be working OK. Also the Fn + F5 function is now closing/opening the external monitor, but nothing appears on the laptop screen other than a very faint image.

The low voltages through the inverter connection looks to be the problem, which I believe indicates that the motherboard is the cause. I do not think it is worth repairing, unless you have any further ideas. Appreciate your help.

Dennis

Hi my new laptop had accidentaly fell down and now the screen is displayed in two different resolutions. Left side shows the actual resolution and the right side shows a slightly dull resolution. Is there any way to rectify the issue?

Most likely the LCD screen was damaged.

Will this cover under warranty?

Depends on the type of warranty you have.

My new laptop display won’t work. Original problem occured with intermittent flickering when lid was moved. This I put down to bad display cable and ignored (bad idea in hindsight). Display finally flickered , had a white cloud and then black. Laptop boots up fine and backlight turns on when it’s supposed to but screen remains blank. Works perfectly through external monitor. I then replaced the display cable with no change. Replaced display with brand new identical and no change.

Sounds like the video cable problem to me.
Did you buy the replacement video cable from a reliable source? Maybe the new cable is bad?
Make sure the cable is plugged correctly into the motherboard. Double check the connection.

I have two Uniwill/Tiny 755SI4 laptops, which I will call A & B.
The A machine screen will not power up the screen although you can see the image faintly in the background. The A laptop provides a perfect picture through a remote monitor.

If I exchange the screen on laptop A, and connect it to laptop B, the screen works perfectly. However, the screen originally working on laptop B also only shows a faint image when connected to laptop A. This suggests that both screens are OK and the problem is possibly with the motherboard.

You are correct. Most likely this is not screen related problem.
I’m not familiar with this model but I think you should take a closer look at the lid close switch on the laptop A. Is is a physical button?
Maybe the lid close switch is dirty and got stuck inside the case? Try tapping on the lid close switch while the laptop A is turned on.
I had a very similar problem just recently and it was an Acer laptop.
1. I tried a good working screen on the laptop and the backlight didn’t work (even though I had a very faint image).
2. I purchase a new inverter and it didn’t help either.
Only after I pressed on the lid close switch many times with a small screwdriver, the backlight turned on and started working properly. It was a tiny switch close to the right hinge.

My new laptop display won’t work. Original problem occured with intermittent flickering when lid was moved. This I put down to bad display cable and ignored (bad idea in hindsight). Display finally flickered , had a white cloud and then black. Laptop boots up fine and backlight turns on when it’s supposed to but screen remains blank. Works perfectly through external monitor. I then replaced the display cable with no change. Replaced display with brand new identical and no change. I tried hooking it up with an old 14″ display (mine is 17″) and sure enough i could make out my background on display (image was dark but no backlight on as cables were different).
I’m stumped now to what my problem could be and if anyone has an idea I greatly appreciate it.

Regards,

Brian.

If I exchange the screen on laptop A, and connect it to laptop B, the screen works perfectly. However, the screen originally working on laptop B also only shows a faint image when connected to laptop A. This suggests that both screens are OK and the problem is possibly with the motherboard.

The screens both have a separate lead for video and inverter. The inverter has 6 wires connecting to the motherboard’s 12 pin connector. Pins 1 to 5 and pin 12 as ground. Voltages for laptop A with the inverter connected are as follows :
pin 1 – 2.8v, pin 2 – 2.8v, pin 3 – 1.8v, pin 4 – 2.71v pin 5 – 0.0v, but the screen is not showing a proper image. If I disconnect the inverter cable (leaving the video cable connected) the voltages are : pin 1 – 18.78v, pin 2 – 18.78v, pin 3 – 1.87v, pin 4 – 3.24v, pin 5 – 0.0v. On the fully functional laptop B the voltages are : pin 1 = 19.48v, pin 2 – 19.48v, pin 3 – 0.51v, pin 4 – 2.30v pin 5 – 0.0v.

As I have proved that both screens are fully working on laptop B, and the voltages from laptop A motherboard without the inverter connected are similar to the those of the fully functional laptop B, I am confused. I have noticed that the FN + F5 key will not close down the external monitor connected to laptop A.

Any suggestions to resolve this problem are welcome. Many thanks.
Dennis

You can never ever imagine how much my joy goes here.
LCD cable was disconnected just as you suggested.
You saved my mostly new laptop.
Thank you so much !!!

I’m glad to help.

Maybe, in some days or from time to time, I’d like to ask another LCD monitor problem. It gives similar image like your above pictures. I’m not sure if you can accept my questions, since it’s not related to laptop, but only LCD monitor.

I can with laptops but not desktop LCD screens.
If the LCD monitors shows garbled image, it’s either bad cable or the monitor is bad and has to be replaced.

Before coming to this site, I’d red hundred of pages about LCD issue. You just earn my time & money.
You’re awsome.

(Maybe, in some days or from time to time, I’d like to ask another LCD monitor problem. It gives similar image like your above pictures. I’m not sure if you can accept my questions, since it’s not related to laptop, but only LCD monitor.)