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The Computer boots up, but nothing shows up on the screen.

Just curious if this could be a connection issue with the screen or internal hardware problem.

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  • Computers & ... Master
  • 5,660 Answers

There is an easy way to find out, Jodie.

1) Laptop OFF, monitor OFF, attach a VGA monitor to the VGA port on the laptop.

This is an example of a VGA port, and a VGA Cable,

http://en.wikipedia.org/wiki/VGA_Connector

Scroll down for an example of a VGA Cable.

You can use a CRT type of monitor, (Looks like a small TV), or a flat LCD screen monitor if it has a VGA cable.

(Now watch your laptop not have a VGA port. HDMI, or DVI.
This is why the manufacturer name, and model number of the laptop, needs to be posted.
The model number is located on the Bottom of the laptop )

2) Turn the monitor on. If a CRT type allow it to warm up.
Turn the laptop on.
By factory default settings, the external VGA monitor should show graphics.

If not;
There are at least 3 display options;

1) Internal monitor of laptop ONLY
2) Internal monitor of laptop AND external VGA monitor
3) External VGA monitor ONLY

Hold the Fn key down, and tap once on the Display Toggle-Over key.

(Ahem........nope can't tell you which one it is.
HP? Usually the F4 key
Acer? F5 key
Lenovo/IBM? F8 key.
Don't hold me to it, though )

Still no display on external VGA monitor?
Hold the Fn key down again, and tap once more on the Display Toggle-Over key.

NO display on external monitor means an internal hardware problem.
Graphics chipset.
Most of the time it is the mounting of the graphics chipset, TO motherboard. They are soldered directly to the motherboard, UNLESS it is an actual graphics card.

MANY a laptop manufacturer touts their laptops have a graphics card, when in reality that is a bunch of Hooey!
Just advertiser's license to mislead the public.

If that is the problem, it can be dealt with.

[Just for quick edification, the graphics chipset is mounted to the motherboard, via a BGA surface mount. Ball Grid Array.
View the following short video, and watch a BGA Rework Station at work, and also learn more about the BGA surface mount,

http://ersa.com/art-ir-pl-650-346-1472.html

Scroll down, click on the red - Take a few minutes to view the IR 650 demo video ]

Graphics show on external monitor?
Problem is the Video Cable, or inside the Display Assembly.

[ Display Assembly is the;
1) LCD screen,
2) Screen Frame: Metal frame which surrounds the LCD screen,
and holds the layers of the LCD screen in place,
3) Display Bezel (Thin plastic frame in front of the LCD screen)
4) Web Camera (If option)
5) Screen Inverter (If used)
6) Display Cover. (Top cover over LCD screen. The cover you look at when the laptop is closed)
7) Wireless Antenna
8) Backlight ]

A primer before we go on;

An LCD screen cannot produce light,

http://solutions.3m.com/wps/portal/3M/en_US/NA_Optical/Systems/BehindTheScenes/Optics101/

(Click on the monitor image)

It needs an additional light source. A Backlight is the additional light source.
A Backlight can be a CCFL, (Or two of them), or a series of LED's.
(Light Emitting Diode)

A CCFL is a Cold Cathode Fluorescent Lamp.
Similar to Fluorescent lighting used in homes, and businesses, but on a MUCH smaller scale.

Average thickness is 2mm. That is a little larger than 1/16th of an Inch.
Average length is almost as long, as the LCD screen is in height.

http://www.laptoprepair101.com/laptop/2007/12/09/replace-laptop-backlight-ccfl-lamp/

View the last 8 photos.

I do not know if your laptop uses CCFL for a Backlight, or a series of LED's. (Model Number, and I will)

A screen Inverter is used to convert the power, (Electricity), from the laptop; for the LCD screen, and Backlight.

SOME of the laptops that first came out, and used LED's for Backlighting; DID use a screen Inverter.
Most cases now is that if a laptop uses LED's for Backlighting; NO screen Inverter is used.

If the fault is found to be a bad Backlight, AND the laptop uses CCFL for Backlighting;

I ADVISE do NOT replace the CCFL Backlight yourself!!!!

They contain Mercury, just like their bigger 'cousins' used in homes, and businesses.
Mercury is a POISON to the human body. Can kill you QUICK!
Plus they are fragile, and are broken easily.

The laptops that use a series of LED's for a Backlight, have the entire LCD screen replaced. It is a unit. LCD screen, and LED backlights.

Primer over.

Laptop on, take a flashlight, and shine it at various angles on the LCD screen.
See faint images? Your screen Inverter is bad, (IF used), or your Backlight is bad.

Display Bezel removed, the screen Inverter is usually located at the bottom of the LCD Screen Frame.
To test a screen Inverter requires a sensitive multimeter.
Read fairly expensive,

http://www.fonerbooks.com/test.htm

Just drag the laptop down to the nearest computer repair shop, and have them test it?
Ummm, no.
A) Doubtful they will want to fool with a laptop partially disassembled. Too much 'litigation'. They could be held responsible for someone else's mistake.
B) They will just want to sell you a new/used laptop.

Most just replace the screen Inverter, due to the low cost, and ease of access to replace. ($10 to $20 bucks)

The Video Cable connects to the motherboard, and usually under an area under the Keyboard, or Switch Cover.

(Switch Cover: Cover that contains the Power On switch {Button}, and LED indicator lights. Under the LCD screen, and above the Keyboard)

It then routes through Latches, and Tabs, over to the left Hinge.
From there it goes up into the Display Assembly.
It then connects to the LCD screen, and screen Inverter; if used.
(Or up to the series of LED's used for a Backlight)

Due to just the normal opening, and closing of the laptop; the Video Cable may be pinched; and pulled on.

This can cause one of two things, or both;
1) Video Cable connection at motherboard may be pulled loose.
Video Cable connections at screen Inverter (If used), or LCD screen; may be pulled loose.

2) Damage to the tiny wires inside the sheath of the Video Cable.
(Stretched/Broken)

This makes the Video Cable the 'problem child'. It, and the screen Inverter, are on the top of the list with display problems.
(However 90 percent of the time, the fault can be attributed to a bad screen Inverter)

ALL power is removed, AC adapter (Charger), and Battery.
Laptop is disassembled far enough, to access the motherboard connection of Video Cable.

You have to PHYSICALLY check to see if the Video Cable, is plugged in tight. Visual inspection will NOT do. (Try to plug it in tighter)
Still no?

Disassemble the Display Assembly. You have to go far enough, that you can tilt the LCD screen forward, and check the connections on the back. With the Display Bezel removed, you check the screen Inverter connection. (IF used)

Still no? All Video Cable connections are tight?
You HAVE to rule the Video Cable out, as the problem.
This means taking a multimeter set to OHM's, (1K), and check EACH, and every wire in the Video Cable for continuity.

Makes sure there are no broken wires in the Video Cable.
No multimeter? Suggest take the Video Cable down to the nearest small computer shop, and have the resident tech check it out for you.
Should just be a few bucks.

Video Cable is good? Go on.

Screen Inverter is next.

Video Cable, and screen Inverter check out OK? (Replaced screen Inverter)
Then the problem is the LCD screen.

Video Cable? Varies. I have seen them from $9 bucks, up to $40.
Usually $9.
Screen Inverter? As stated, $10 to $20.
LCD screen? $60 to $240.

This is why it pays to go through a flowchart, and not buy an LCD screen needlessly. Would Bl-ow if the problem is a $9 Video Cable, and you bought a $240 LCD screen; and that wasn't the problem.

Please post in a Comment for additional questions,
Regards,
joecoolvette

[ With the model number I may be able to give you a link, to a free Service Manual, and perhaps pictorial guides too.
With them the above won't seem like so much info, it drags the brain down.

For example,

http://www.insidemylaptop.com/disassemble-hp-pavilion-dv7-notebook/

http://www.insidemylaptop.com/replace-cracked-screen-dell-inspiron-14z-laptop/

http://www.tim.id.au/blog/tims-laptop-service-manuals/

HP has most laptop Service Manuals listed on their HP Support website.
So does Dell.

http://www.irisvista.com/tech/

Posted on Jan 02, 2013

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Posted on Jan 02, 2017

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nate6556
  • 103 Answers

SOURCE: Acer Aspire One, blank screen

if you've only had it 5 months send it back to acer, there is a hardware problem with your screen, it sounds like something may have came unhooked, possibly if it was dropped? I'm not sure but they always give 1 year warranty on things like that

Posted on Jul 25, 2009

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