Solved Vertical flickering lines on screen

Acer Aspire as5315-2826-vhb notebook
April 14, 2012 at 03:29:36
Specs: Windows XP, 1gb
My Compaq mini 110 netbook has multicoloured flickering vertical lines on the screen. It boots up as normal. Everything else seems ok. However, there is a completely blank screen on external monitor. Could it be a graphics fault(GPU). Or is it simply a broken LCD screen?

See More: Vertical flickering lines on screen

Report •

April 14, 2012 at 03:35:52
✔ Best Answer
To use external monitor there may be a key combination usually "Fn + F4 or 6 or 8" to activate the monitor.

Regards your issue it could be the invertor.

Googling is quicker than waiting for an answer....

Report •

April 14, 2012 at 03:42:36
Thats a very useful piece of info. I connected the external monitor to the vga port on the compaq and there was absolutely nothing on the monitor. I will try your idea of using the fn key with f4. If I get perfect graphics on the external monitor , then perhaps it is the lcd that is faulty.

I thought that if the inverter fails you get absolutely nothing on the screen. The backlight is working as the screen is bright.

Thanks for your answer

Report •

April 14, 2012 at 04:10:56
tried the fn key with the f2 at the same time and the graphics are showing up as completely perfect on the external monitor. Looks a though it may be the lcd screen or inverter.

Report •

Related Solutions

April 14, 2012 at 07:11:07
Have you, or is it possible someone else who had access to this computer...
- dropped it, or dropped anything on it, or otherwise exposed it to a physical jolt ?
- spilled liquid on it, or sprayed it with liquid, or exposed it to liquid such as rain ?

Since the video last worked properly all the time, has there been a power failure event that happened while the AC adapter was plugged in ?

Those things are the most frequent reasons something inside the laptop has been damaged.

Your symptoms can also be caused by damaged wiring between the video adapter and the built in display.

Laptop no video (or video problems), and battery, AC adapter, power jack T shooting.
See response 1:

Report •

April 14, 2012 at 10:08:49
thanks for your response. There havent been any power outages, but it may have been dropped or stood on by the previous owner. Having got it to work on an external monitor with aperfect display, you may be right about the cable connector. I need to possibly re-connect it to the mobo and also to the lcd panel to test.

Alternatively it may need a new lcd panel. Further testing needed..

Report •

April 14, 2012 at 11:01:32
If you EVER have the AC adapter plugged into the netbook or laptop when you're NOT near it or when you're not home or you're asleep, it's still possible that it's been damaged by a power spike or surge that happened during a power failure event that you are not aware of, especially if you do not have the AC adapter plugged into something that protects the computer against damage caused by those things.

If it's been dropped the LCD display MAY have been damaged, and the wiring or the connector on either end of the wiring between the video adapter and the built in display MIGHT have been damaged or have been loosened because of that, but that's not likely. It's more likely the wiring is damaged where it passes through the hinge area.

The HP web site usually offers a free Maintenance manual for you model series somewhere in the support and downloads for your specific model

Acer does not offer free servicve manuals for you to download, but you can usually find the service manual for your laptop or netbook series when you search for one on the web, for free, or for a small fee.

I have a friend's Acer Aspire laptop that was dropped.
It has Vista on it and it's about 4 years old. At first the LCD display was not working at all after it had been dropped but the computer worked fine with an external monitor. Several months after that the keyboard and ALL the USB ports stopped working (one in the mboard, two in a card that plugs into the mboard that also connects to the DC jack for the AC adapter's connection). The computer still boots fine, the battery still charges fine, it still displays fine on an external monitor, but you can't get past the Logon screen when there's no way a keyboard will work. Previously a corded USB keyboard worked fine for that.
I found a free service manual for the series, checked the connections of everything inside the case, unplugged things and plugged them back in, but nothing I did cured the problems.
There is obvious damage to one corner of the mboard near the hinge area (the outside of the case has slight damage at the same corner) , but nothing obviously showing evidence of damage other than that.
I came to the conclusion that at least the mboard must be replaced, or maybe just the small power board that has the two USB ports on it, and doing that may not fix the problem with the LCD display. The owner chose not to risk spending any money for used or new parts to possibly fix the problems, despite my not charging him for labour.

Report •

April 14, 2012 at 11:33:56
Many thanks for your excellent response.
I am considering putting another lcd in and if it has the same effect, then it must be a cable connection issue. Also, I am considering dismantling the netbook and re-connecting the screen to motherboard cable.

It could still turn out to be the screen thats faulty. But i am not buying a replacement yet despite the relative cheapness of a new one, until I have ruled out cable connector issues.

The fact that the graphics are perfect on the external monitor rules out a motherboard graphics/gpu problem.

Report •

April 14, 2012 at 11:55:40
Don't buy a used display assembly unless the ad says the backlight (CCFL) has been REPLACED, otherwise the useful life of the display will be shorter. Backlights ( CCFLs) burn out eventually, the same as any other florescent lamp / bulb. .
The wiring between the display assembly and the video adapter is relatively cheap to replace. The part number of that may be in the HP Maintenance manual, or on a label attached to it. There may be a HP part number in that manual for, or on the back of, the display assembly too.

(If you get a new monitor or TV, get one that has an LED (LED LCD), NOT an LCD (uses one or more CCFLs) display, for the longest possible useful life of the display. LED (LED LCD) displays use white light (full spectrum) leds as the light source behind the LC pixel grid. I've never encountered an led on something that provides an accurate voltage to it that has burned out. I haven't noticed ANY laptop or netbook that has that type of display, so far. )

When you have an LCD display for a computer, it's a very good idea to set your Power Options in Control Panel to turn off the display after xx minutes of inactiity to extend the time the display will produce a useful display. Pressing a key or a mouse button after the screen has gone black will restore the display in a short time.
(Using a screen saver that displays anything will not do that - the CCFL(s) behind the LC pixel grid are on all the time anything is being displayed.).

Report •

April 15, 2012 at 02:53:25
Thanks for those useful tips. I am not sure if the display that Compaq use for the mini is LED or LCD. I know that the acer netbooks all use LED as I have 2 of them.

My next move is to remove the keyboard and see if that gives me access to the motherboard to screen cable connector. So that i can reconnect it

I had a very similar problem of flickering lines on my acer d250. That was cured by disconnecting and then reconnecting the screen cable to the motherboard. It wasnt corredtly seated in the socket and was causing the problem.

I am hanging fire with the screen and testing the cable first.

Many thanks for you responses tubesandwires.

Report •

April 21, 2012 at 08:34:38
It turns out that the screen is an LED screen and so has no inverter. I picked up a 10 inch LED screen for peanuts at a Manchester computer market. It has a crack in it. I connected it up to the compaq mini and have an almost perfect screen . It wasnt the cable . It was the LED screen which was faulty . All I need is a replacement screen . May use the one with a samll crack for now as the netbook is now useable. There is only a small imperfection in the top left hand corner. Sometimes picking up a cheap cracked screen can be useful for testing purposes. Problem is now definately solved.
Thanks for all contributions. Especially the one about the fn and f4 key to test on an external.

Report •

April 21, 2012 at 12:31:57
Thanks for the thanks.

It's likely you, or someone else who had access to this computer, dropped it, or dropped something on it, or otherwise exposed it to a physical jolt.

Report •

Ask Question