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29 Posts
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933675
E6420 - Bios A07 - Diagnostic false positive - Lcd Cable
Hi everyone!
I found a weird bug with the A07 bios update on the E6420 (i5-2520m). The disgnostics utility report "Lcd Error 2000-0415". When I revert back to A06, the problem disapear.
Anyone can repeat this error? I had open a case to replace my lcd cable and I will contact Dell to cancel the cable replacement. But if no one can repeat the problem, maybe the cable is really damaged and the A07 bios is better detecting it.
I have no problem using the computer.
Thanks.
malkboy
117 Posts
1
February 18th, 2012 10:00
There's a long and a short version of this... From what I understand, Dell implemented a change in the hardware that allowed for the cable test to work which they've released on newer versions of the systems and enabled in the BIOS. For systems with the old cables it will always generate a false positive. It's not an error in the BIOS, it's just that test isn't supported by the hardware you have.
malkboy
117 Posts
1
March 28th, 2012 20:00
I know that I'm right... I can also tell you definatively that unless someone makes an exception to policy, Dell will not replace the cable because it generates a false positive. The test on the cable didn't exist for the revision of cable that you have and as such there's no hardware failure.. no hardware failure means no hardware replacement. Upgrade the BIOS away, I'm not sure why you're worried about a false positive. If the cable that it's testing failed, you'll have no video anyway..
malkboy
117 Posts
1
March 30th, 2012 17:00
The issue with thinking Dell will ever fix it is this.. The test is a new test designed for the new cable. It didn't exist before. It goes out and seeks information from the cable that the old one doesn't know about (I don't even think it's got the bit to detect/reply) and when it doesn't tell the system hey I'm here it fails because that's what the failing part would do. Without making the test pointless, there's no fix..
It's not a problem unless you make it one really, you just have to be aware it's a false positive and move on when you get that error.
guido74
3 Posts
1
April 8th, 2013 11:00
Bios A17 solved the hw problem
vm3ssy
2 Posts
0
November 6th, 2011 05:00
hello,
i have the same problem as well. since upgrading bios i get the 2000-0415 error. Also though when i plug the power adaptor in, the machine comes on and then turns off.
weird indeed.
AnarethoS
29 Posts
0
November 6th, 2011 08:00
Thanks for your confirmation.
But on my side, I don't have the "power-on then power-off" problem you are speaking about.
I reverted to A06 and I called Dell to let them now. They will fill a bug report (At least, I hope so!)
Thanks!
AnarethoS
29 Posts
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November 7th, 2011 11:00
Anyone else can confirm?
AnarethoS
29 Posts
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November 8th, 2011 18:00
I have tried the A07 bios update on a E6520. Same problem.
urbanexplorer
6 Posts
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November 9th, 2011 07:00
We have seen this same problem on an e6420 as well.
DC_THQ
1 Message
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November 25th, 2011 03:00
I have seen this same problem on an e6420, too
kpanchoo
1 Message
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November 30th, 2011 09:00
i currently have the same problem with the dell e6420 2720QM
pmrozek
2 Posts
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December 1st, 2011 01:00
I have the same problem with BIOS A07. The same error! Full HD screen. E6520!
Supervisor1
1 Message
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December 1st, 2011 01:00
After upgrading to A07 on my E6420 i7-2720 the CPU frequency is allways by 100%. I'm back to A05 and everything works fine.
pmrozek
2 Posts
0
December 1st, 2011 08:00
I only get the 2000-0415 error after upgrading to A07. FHD E6520.
dplus
3 Posts
0
December 6th, 2011 14:00
I have a Dell Latitude E6520 and since upgrading from BIOS A06 to A07 I have this problem too:
2000-0415 , Value 278: Check LCD Cable.
There is absolutely nothing wrong with my LCD cable or HD screen of my laptop.