LED display not functioning after formatting (dell inspiron 640m)

resten · 04-10-2009, 03:36 PM

Hi,

I have formatted my dell laptop and I'm pretty convinced I have reinstalled all of the necessary drivers.

However, now the LED display (where the status of wifi, power etc is shown) isn't functioning.

Does anyone know how to get the LEDS working again?

Kind regards
Dan

**TriggerFinger** · 04-10-2009, 03:41 PM

Hi Dan,

LEDs for power, Caps Lock, Num Lock, and battery is NOT controlled by any operating system driver (at least AFAIK). Hardware wise they should be lighting up (ex. the Power ON LED and the battery LED) when you switch the computer ON.

In your case, you said the do not light up, right? But does the laptop power ON? Any signs of life (audible activities from fan or HDD and CD/DVD drives)?

resten · 04-10-2009, 03:45 PM

Laptop is fully functioning, no problems at all (apart from getting bluetooth working again but that's another matter!)

It's powered up, running from mains power, wifi is installed and working etc etc, just no indication from LEDs

All were fully working before formatting

**TriggerFinger** · 04-10-2009, 03:54 PM

So laptop is working fine just no LEDs that light up? If yes, you can check their connection. I believe they are under the hinge cover plate. For the removal and replacement procedures, refer to the manual here:

http://support.dell.com/support/edoc...n/SM/index.htm

resten · 04-10-2009, 03:54 PM

ah it appears it was a hardware issue, thanks, seem to be getting them back one at a time

resten · 04-10-2009, 03:55 PM

thank you for your help

04-10-2009, 03:36 PM	#1 (permalink)
resten Registered User Join Date: Apr 2009 Posts: 4 OS: XP sp3	LED display not functioning after formatting (dell inspiron 640m) Hi, I have formatted my dell laptop and I'm pretty convinced I have reinstalled all of the necessary drivers. However, now the LED display (where the status of wifi, power etc is shown) isn't functioning. Does anyone know how to get the LEDS working again? Kind regards Dan

04-10-2009, 03:41 PM	#2 (permalink)
TriggerFinger Moderator Hardware Team Join Date: Jan 2008 Location: USA Posts: 11,853 OS: Vista SP1, XP SP3, PCLinuxOS2007	Re: LED display not functioning after formatting (dell inspiron 640m) Hi Dan, LEDs for power, Caps Lock, Num Lock, and battery is NOT controlled by any operating system driver (at least AFAIK). Hardware wise they should be lighting up (ex. the Power ON LED and the battery LED) when you switch the computer ON. In your case, you said the do not light up, right? But does the laptop power ON? Any signs of life (audible activities from fan or HDD and CD/DVD drives)? __________________ DBAN - Memtest86+ - BartPE - Linux LiveCD - ImgBurn - HDD Diags - Disk Copy HOW TO BURN AN ISO FILE

04-10-2009, 03:45 PM	#3 (permalink)
resten Registered User Join Date: Apr 2009 Posts: 4 OS: XP sp3	Re: LED display not functioning after formatting (dell inspiron 640m) Laptop is fully functioning, no problems at all (apart from getting bluetooth working again but that's another matter!) It's powered up, running from mains power, wifi is installed and working etc etc, just no indication from LEDs All were fully working before formatting Last edited by resten; 04-10-2009 at 03:48 PM.

04-10-2009, 03:54 PM	#4 (permalink)
TriggerFinger Moderator Hardware Team Join Date: Jan 2008 Location: USA Posts: 11,853 OS: Vista SP1, XP SP3, PCLinuxOS2007	Re: LED display not functioning after formatting (dell inspiron 640m) So laptop is working fine just no LEDs that light up? If yes, you can check their connection. I believe they are under the hinge cover plate. For the removal and replacement procedures, refer to the manual here: http://support.dell.com/support/edoc...n/SM/index.htm __________________ DBAN - Memtest86+ - BartPE - Linux LiveCD - ImgBurn - HDD Diags - Disk Copy HOW TO BURN AN ISO FILE

04-10-2009, 03:54 PM	#5 (permalink)
resten Registered User Join Date: Apr 2009 Posts: 4 OS: XP sp3	Re: LED display not functioning after formatting (dell inspiron 640m) ah it appears it was a hardware issue, thanks, seem to be getting them back one at a time

04-10-2009, 03:55 PM	#6 (permalink)
resten Registered User Join Date: Apr 2009 Posts: 4 OS: XP sp3	Re: LED display not functioning after formatting (dell inspiron 640m) thank you for your help