2 Bad Screens, or MB?

[stephenstud]

Hi, and thank you for letting me join!

I have a Presario F500, and a V2000. The F500 screen flickers then goes dark. You can still see the screen if you put a flashlight on it. The V2000, has lines and a white bar on the right hand side of the screen. Both work fine hooked up to an external monitor. Everything I read seems to point towards bad screens. I just wanted someone elses opinion. Thank you for any help.

 

[mfenn]

For the F500, the fact that you can still see the image if you use a flashlight on the screen means that the computer and LCD are working fine. The backlight has gone out. Usually this is a simple inverter swap.

For the V2000, that sounds like a signal issue. My bet is that the internal cable from the motherboard to the display is bad. Also replaceable with some effort.

 

[stephenstud]

For the F500, the fact that you can still see the image if you use a flashlight on the screen means that the computer and LCD are working fine. The backlight has gone out. Usually this is a simple inverter swap.

Great I will look that up, and see if its worth doing

For the V2000, that sounds like a signal issue. My bet is that the internal cable from the motherboard to the display is bad. Also replaceable with some effort.

Should I just replace it or just see if it came loose? Im asking, because if its better to replace then I would rather go that route


Thank you for the help!

 

[piasabird]

If you are using a video card maybe it is going bad because you could have killed it by overclocking it.

Panels go bad all the time. Sometimes they dont use the right parts when they assemble them.

Example:

http://www.avsforum.com/t/1388883/replacing-blown-capacitors-on-samsung-lcd-ln46a650

 

[stephenstud]

If you are using a video card maybe it is going bad because you could have killed it by overclocking it.

Panels go bad all the time. Sometimes they dont use the right parts when they assemble them.

Example:

http://www.avsforum.com/t/1388883/replacing-blown-capacitors-on-samsung-lcd-ln46a650

How do I se a video card? These are laptops And neither one of them were overclocked. They belong to my aunt and uncle. I know they can surf, and check email.... Thats about it.

 

[mfenn]

Should I just replace it or just see if it came loose? Im asking, because if its better to replace then I would rather go that route

The cables are super fiddly, so it is quite possible that it just came loose. That being said, if I were going to tear down the laptop to check the connection, I would go ahead and replace the cable anyway.

 

[stephenstud]

Ah... Ok, I will start to tear it apart and check around for a (Maybe) new cable Thanks again!!

 

[Cerb]

I've never seen a cable come loose. The connectors and latches are designed to make that practically impossible, without opening it, typically. However, they do go bad (they're made to twist a lot, but if they get kinked, the wires could break, and/or they could start pulling loose from some other point inside the cable assembly), it's cheaper than a screen, and it would be the first thing to check. Typically, when a cable has failed, there are no external physical signs of it, so you need to replace it just to see if it was good or not.

 

[stephenstud]

I replaced the screen today on the F500, and it still went dark on me... I can still see it with a flash light. Whats causing this? Thank you.

 

[denis280]

did you try with a external monitor.

 

[Steltek]

I replaced the screen today on the F500, and it still went dark on me... I can still see it with a flash light. Whats causing this? Thank you.

mfenn already gave you your answer on this - if you can see the screen with a flashlight, either the inverter or the backlight has failed. The inverter is more likely to die than the backlight, in my experience.

Both are fixable with effort -- you can usually get acceptable replacements for a few bucks on eBay.

 

[mfenn]

I replaced the screen today on the F500, and it still went dark on me... I can still see it with a flash light. Whats causing this? Thank you.

Not sure why you changed the screen. The inverter should have been your first stop (like I mentioned earlier).

 

[stephenstud]

Replaced the inverter, and it was bright for about 5 seconds...lol I think this thing is done... What's a good idea now? Thank you!

 

[stephenstud]

Its the backlight? I put on another screen from another laptop brand, and it worked fine. The screen was a little off, I'm sure because its not the right kind. But at least it stayed lit up....

 

[mfenn]

Yes, the backlight is also a possibility. The inverter is just a more common failure. If it works with a whole nother screen assembly (backlight and screen), then yeah replacing the backlight on the original screen should fix it.