Toshiba laptop POST display problem

binuvrm · 10-04-2009, 09:13 PM

Hello

My toshiba laptop wont display anything on POST. Display will show up after vista logo. everythings fine after vista logo. During POST CCFL lights up for a second and will go off. It will light up again from vista logo. Because of this i cant access the bios screen. I just replaced the lcd screen and inverter but still problem persist. Is it because of the lcd video cable?
if i uninstall the video driver ccfl wont light up at all. Then i had to plug my external display to install driver then it will start from vista logo. Pls help me in this situation

binu

ferasward · 10-05-2009, 07:32 AM

A thousand thanks and give you the Wellness

Madcatz · 10-05-2009, 11:08 AM

plug in an external monitor and power the laptop on, can you see the bios on that? if you can, access it, go to the advance or display tab, and switch default monitor to the lcd panel.

binuvrm · 10-05-2009, 08:58 PM

Thank you very much for the solution and faster reply. I will surely do as u suggested and will post back.

binuvrm · 10-06-2009, 04:19 PM

i connected my external monitor and strangely no display something happening but cant see anything. can i reset bios by reseating bios battery inorder to change the display. thanks

win98forever · 10-06-2009, 04:29 PM

Press the key that has the picture of a computer on it as it boots to activate the external monitor. On mine it's F5.

binuvrm · 10-06-2009, 06:39 PM

i did everything but no display on external monitor.

Madcatz · 10-07-2009, 07:30 AM

what model of Toshiba is it?

and Toshiba's by default, if you power it on with an external already hooked up, it will automattically switch to the external. As long as everything is working properly, lol.

As for removing the bios (cmos) battery, that depends on the model, some you can remove, some are soldered onto the motherboard and cannot be removed. Thats why they make other ways to reset the bios :)

win98forever · 10-08-2009, 07:52 AM

On my Toshiba A135-S4656 I had to press the F5 or maybe it was F9 key to get the external monitor to work. It would not run if I allowed the machine to power up on it's own I figured this would help. The onboard monitor was broken from a fall and only showed part of the desktop.
I wasn't trying to put guesses or bad info on here the tech who eventually replaced the LCD for me told me to try this and it worked. I was in the middle of a recovery when the whole desktop finally went out. That may explain why it didn't automatically use the external monitor I just thought this was a normal thing.

10-04-2009, 09:13 PM	#1 (permalink)
binuvrm Registered User Join Date: Oct 2009 Posts: 4 OS: windows vista 32bit	Toshiba laptop POST display problem Hello My toshiba laptop wont display anything on POST. Display will show up after vista logo. everythings fine after vista logo. During POST CCFL lights up for a second and will go off. It will light up again from vista logo. Because of this i cant access the bios screen. I just replaced the lcd screen and inverter but still problem persist. Is it because of the lcd video cable? if i uninstall the video driver ccfl wont light up at all. Then i had to plug my external display to install driver then it will start from vista logo. Pls help me in this situation binu

10-05-2009, 07:32 AM	#2 (permalink)
ferasward Registered User Join Date: Oct 2009 Posts: 2 OS: xp	Re: Toshiba laptop POST display problem A thousand thanks and give you the Wellness

10-05-2009, 11:08 AM	#3 (permalink)
Madcatz Tech Hardware Team Join Date: Apr 2008 Location: Ann Arbor, MI Posts: 1,424 OS: XP/7/Server 2008 My System	Re: Toshiba laptop POST display problem plug in an external monitor and power the laptop on, can you see the bios on that? if you can, access it, go to the advance or display tab, and switch default monitor to the lcd panel. __________________ memtest86+ \| Hard Drive Diags \| Speed Fan \| Unknown Device Identifier

10-05-2009, 08:58 PM	#4 (permalink)
binuvrm Registered User Join Date: Oct 2009 Posts: 4 OS: windows vista 32bit	Re: Toshiba laptop POST display problem Thank you very much for the solution and faster reply. I will surely do as u suggested and will post back.

10-06-2009, 04:19 PM	#5 (permalink)
binuvrm Registered User Join Date: Oct 2009 Posts: 4 OS: windows vista 32bit	Re: Toshiba laptop POST display problem i connected my external monitor and strangely no display something happening but cant see anything. can i reset bios by reseating bios battery inorder to change the display. thanks

10-06-2009, 04:29 PM	#6 (permalink)
win98forever Registered User Join Date: Sep 2009 Posts: 123 OS: w2k	Re: Toshiba laptop POST display problem Press the key that has the picture of a computer on it as it boots to activate the external monitor. On mine it's F5.

10-06-2009, 06:39 PM	#7 (permalink)
binuvrm Registered User Join Date: Oct 2009 Posts: 4 OS: windows vista 32bit	Re: Toshiba laptop POST display problem i did everything but no display on external monitor.

10-07-2009, 07:30 AM	#8 (permalink)
Madcatz Tech Hardware Team Join Date: Apr 2008 Location: Ann Arbor, MI Posts: 1,424 OS: XP/7/Server 2008 My System	Re: Toshiba laptop POST display problem what model of Toshiba is it? and Toshiba's by default, if you power it on with an external already hooked up, it will automattically switch to the external. As long as everything is working properly, lol. As for removing the bios (cmos) battery, that depends on the model, some you can remove, some are soldered onto the motherboard and cannot be removed. Thats why they make other ways to reset the bios :) __________________ memtest86+ \| Hard Drive Diags \| Speed Fan \| Unknown Device Identifier

10-08-2009, 07:52 AM	#9 (permalink)
win98forever Registered User Join Date: Sep 2009 Posts: 123 OS: w2k	Re: Toshiba laptop POST display problem On my Toshiba A135-S4656 I had to press the F5 or maybe it was F9 key to get the external monitor to work. It would not run if I allowed the machine to power up on it's own I figured this would help. The onboard monitor was broken from a fall and only showed part of the desktop. I wasn't trying to put guesses or bad info on here the tech who eventually replaced the LCD for me told me to try this and it worked. I was in the middle of a recovery when the whole desktop finally went out. That may explain why it didn't automatically use the external monitor I just thought this was a normal thing. Last edited by win98forever; 10-08-2009 at 07:56 AM.