LCD Display no picture.

Hi
I have an ACER Aspire 8730 laptop that has no display on the LCD.
The external display works fine and there are no error messages.
I have checked the connections and they are all connected.
The back lights are also working that means the inverter is working correctly.

In the operating system ( win7) the screen detection function finds the external monitor however the standard LCD is not there.

Does this problem sound like a cable issue ?
Thanks

sounds like a cable/panel issue, how did you check that inverter is working?

If external works then your videocard is fine, so the fact that primary lcd doesn't work leaves you with the following:
monitor malfunction (backlight or LCD panel failure)
GPU to monitor connection malfunction (broken wire or connection pulled out of socket)

that's most likely a broken wire that's losing contact and when you close open screen or any other vibration it causes it to regain contact. Or it could be that something expanded due to heat reestablishing the connection.

That pretty much confirms that it's a ribbon problem for you

those ribbons are very fragile
good luck with repairs

*** UPDATE****


Ok I bought a few parts

* LCD Inverter -

* LCD Cable new -

I have replaced the parts and still no luck.

Any ideas ?

Hi

I own a lappy repair company....

NEW screen needed...

All the best Brett

Hi

My rationale being...

I know what I am talking about as we repair hundreds of laptops a month...

And your is for questioning my expertise ?

All the best Brett

so your rationale still has nothing to do with the problem at hand, I can just as well claim to be bill gates and tell the OP to go buy a new laptop. Will I be wrong? No, because that will solve the problem without determining the cause of it as well, but stating something of the top of my head without bothering to explain my reasoning isn't helping anyone unless I fancy a lucky guess. I come to these forums to help people and also to learn, cause obviously enough I don't know everything there is in the IT. Nobody does. So, sorry for taking an offense to your post but it comes off as patronizing and condescending, while failing to explain how you came to your conclusion. "I know what I'm talking about" is not an explanation...

yup exactly my point, unless somebody gives a sound explanation why this or that, I wouldn't spend money till then

How is that relevant to the topic at hand? should I feel bad that we are reading your advice for free? You can stop restating this useless piece of information about yourself, whether true or not, it has no relevance to the issue.

take it or leave it attitude, typical of people taking a guess and having nothing to backup their thinking (or also typical of old generation not wishing to share their knowledge in fear of being replaced by new generation, I've seen this in college, those professors weren't very helpful) . Although, you being an adult I expected you to be able to back up your statements, but I guess not.

yeah cool, how is this relevant?


no offense, but if you cannot provide a rational explanation for your advice I wouldn't pay you a penny for it. If you cannot explain your thinking that means you're just taking a guess. Again, I'm not beating on your because I don't believe you're the owner of some company that repairs laptops, but for your attitude in providing the said advice

**update**

I installed linux ubuntu restarted and my display came back on.
Restarted the display vanished.

---

Restarted and the screen was still blank.
inserted a linux cd and restarted again
screen came back on booted into windows 7

------------------------

This is very frustrating as its not the LCD.. its something more like an IRQ fault or bios issue. I have re-flashed the bios but that has not made any difference.

I am baffled. - The screen is currently working but i am afraid to turn off the laptop as it may not come back on again, primary OS Windows 7

What i think may be the issue

* bios
*graphics card bios.

Its got to be something that posts the signal to say * //display/0 *on.

HELP.

**FIXED! **


After much messing about i changed the graphics card / thermal paste and the screen came on!

Thanks for the advice.

Yes so it seems! or it could be that it needed re-seating ? either way the old card is out and the new one is in with fresh thermal paste to cool! I would advise anyone who is having difficulties with screens to always check the GFX card regardless if its working on a dual screen as like in my issue.
So for parts i spent
LCD Cable from China = £14
Inverter =£3
GFX Card Nvidia 9300m 512MB = £7

Acer aspire 8730g 18.4” laptop = £40

so in total about £64 for a pretty good laptop.
Hopefully there won’t be any more problems with it.