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Laptop blank screen


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#1
daisyday

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Hi! My Samsung P28 laptop has been working fine, but suddenly has this problem:

when I turn it on, I get a completely blank screen... no cursor, no start up message, nothing. The fan starts and the two lights on the side of the laptop

come on, so there is power going in there but no matter how many buttons I press, nothing happens on the screen. What can I do? Any help

appreciated!
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#2
hfcg

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Hello, and welcome to Geeks To Go.
Is it possible for you to connect an external monitor to the laptop?
There is a video port for this on the computer.
I need to know if you have a display with a different monitor.
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#3
daisyday

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Hi, I attached it another monitor, but both screens remained black. The fan is still working, but the laptop doesn't sound as if it 'chugging over' if you know what I mean.
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#4
hfcg

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2004.5.21 REV. 1.0
Processor and Motherboard
CPU Intel Pentium M
Intel Celeron M
Speed 1.4GHz ~ / 1.3GHz ~
Cache 1MB, 2MB / 512K
Chipset ATI RC300MB
BIOS 512KB(4 Mbit), Flash upgradable
Thermal Design Performance 27W TDP
Memory
Memory / Max. Memory 256MB / Max.2GB
Memory type PC2100(266MHz) / PC2700(333MHz) DDR SODIMM
Memory Modules 256MB, 512MB
Sockets 2-slot SODIMM's
Display and Graphics
LCD 14.1" XGA
LCD Vendor / [2nd vendor] Samsung AMLCD (LTN141XF-L05) / [ AU 14.1" XGA B141XN04 V2 R.5 ]
LCD Viewable Area 285.686 x 214.272mm (HxV) / [ 285.7 X 214.3mm (HxV) ]
LCD Resolution 1024 x 768 x 262,144 color ( 18 bit )
Dot Pitch 0.279 x 0.279mm (HxW)
Viewing angle Hor. +45/-45, Ver. +15/-35 / [ Hor. +40/-40, Ver +10/-30 ]
Contrast Ratio min.200 (CR) / [min 150. Typ. 250(CR) ]
Brightness min.130, typ.150 (cd/m2) / [min.120 Typ.150(cd/m2) ]
Response time Rising typ.10ms / max.20ms, Falling typ.30ms / max.50ms
[ Rising typ.20ms / max.40ms, Falling typ.30ms / max.50ms ]
LCD 15" XGA
LCD Vendor / [2nd vendor] Samsung 15" XGA LTN150XB-L03 / [ AU 15" XGA B150XG01 Ver.2 ]
LCD Viewable Area 304.128 x 228.096
LCD Resolution 1024 x 768 x 262,114
Dot Pitch 0.297 x 0.297
Viewing angle Hor. +45/-45, Ver. +25/-35 / [ Hor. +40/-40, Ver +10/-30 ]
Contrast Ratio min. 200(CR) / [ 250(CR) ]
Brightness 160 (cd/m2) / [ 150 (cd/m2) ]
Response time Rising typ.10ms / max.20ms, Falling typ.30ms / max.40ms
[ Rising typ.11ms / max.15ms, Falling typ.24ms / max.30ms ]
LCD 15" SXGA+
LCD Vendor / [2nd vendor] Samsung 15" SXGA+ LTN150P4-L02 / [ AU 15" SXGA+ B150PG01 Ver.04 ]
LCD Viewable Area 304.5 x 228.375 (HxV)
LCD Resolution 1400 x 1050 x 262,144 clolor
Dot Pitch 0.2175 x 0.2175 (HxV)
Viewing angle Hor. +45/-45, Ver +20/-40 / [ Hor. +40/-40, Ver +10/-30 ]
Contrast Ratio min.200(CR) / [ 250(CR) ]
Brightness min.120 typ.150 (cd/m2) / [ 150(cd/m2)
Response time Rising typ.10ms / max.20ms, Falling typ.30ms / max.40ms
[ Rising typ.15ms / max.45ms, Falling typ.35ms / max.45ms ]
Graphics Controller ATi Mobility Redeon 9000 IGP
Video Memory VUMA Max 128MB
Max.Resolution for LFP LVDS 1024 x 768 x 32Bits color (XGA), 1400 x 1050 x 32Bits color (SXGA+)
Max.Resolution for External Monitor 2048 x 1536 @75HZ (CRT)
ATi Mobility Redeon 9700
Video Memory 64MB DDR SDRAM
Max.Resolution for LFP LVDS 1024 x 768 x 32Bits color (XGA),

That is good news!
This indicates that the issue is not with your screen, THE most expensive part on a laptop.
Your memory (RAM) may need to be removed, and then put back in (reseated).
The video shares the system's memory, and will not function if there is a problem.
Please go here to see how to reseat your laptop's memory.

Edited by hfcg, 21 February 2008 - 12:53 PM.

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#5
daisyday

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Hi!
I did as per your instructions, but still nothing has happened. The laptop screen is still black, I'm afraid.
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#6
hfcg

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Do you hear any beeps when you turn on the computer?
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#7
daisyday

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No there are no beeps (it never has beeped, even before this problem) just the fan starting.
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#8
shard92

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Sorry to say but if you are getting no display even on another display ( note you may need to hit a key combination to get it to display to an external monitor.... usually the Fn key plus another ) it may be that your motherboard is dead..... it's possible that this has a seperate video but very doubtful... you'd have to go the manufacturer to find out for sure.... you could also try 1) removing the battery and see if it runs... 2) remove the hard drive and see if the screen lights up ( wont' run but may light the screen ) beyond that you'd just be grasping at straws in the dark....

Good Luck.
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#9
hfcg

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Sorry to say but if you are getting no display even on another display ( note you may need to hit a key combination to get it to display to an external monitor.... usually the Fn key plus another ) it may be that your motherboard is dead..... it's possible that this has a seperate video but very doubtful... you'd have to go the manufacturer to find out for sure.... you could also try 1) removing the battery and see if it runs... 2) remove the hard drive and see if the screen lights up ( wont' run but may light the screen ) beyond that you'd just be grasping at straws in the dark....

Good Luck.

I am afraid that this may be correct.
I was looking for a PCMCIA video card, but the cost is too high for a possible motherboard failure.

Edited by hfcg, 20 February 2008 - 01:39 PM.

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#10
daisyday

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Oh well. I'll try all that you suggest (and hope that I'm not too ham-fisted!) but I don't hold out much hope. A very big thankyou to you for all of your help!
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#11
hfcg

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the video card is built in to the motherboard on laptops.
You can get a PCMCIA video card, but I can not offer any guarantee that will fix the problem.
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#12
shard92

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the video card is built in to the motherboard on laptops.
You can get a PCMCIA video card, but I can not offer any guarantee that will fix the problem.



That is not a true statement. It is in MOST cases but not all cases. I just recently replaced a video card in a Dell laptop and know some toshibas also have replaceable video cards. Again check with your manufacturer for your model.
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#13
hfcg

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Please see post #4
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#14
shard92

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and I was refering to post 11 where you said that on laptops the video is built in. You did not say it is built in on THIS laptop but as a general statement. anyone reading this will now have correct info.... they need to check with their laptop provider as it MAY be a replaceable video card. Granted in most cases ( including this one) it is not.
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#15
hfcg

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and I was refering to post 11 where you said that on laptops the video is built in.

Yes, you are correct. I should have been more specific.
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