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6 Operator
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December 2nd, 2019 06:00
Latitude E5430 CMOS Reset without disassembly!!!
Good day everyone.
I was working on a test for an OP and I wanted to reset the CMOS before I start.
What I found is that to get to the CMOS battery you must disassemble the whole laptop.
Most of the time when the CMOS battery is difficult to get to there should be a place to short without disassembling the whole laptop.
FOUND IT!!!
Use a small flat head screwdriver and short the 2 contacts.
CMOS is now reset.
As with most the contacts are located near the memory.
Sometimes located under the plastic cover on the system board under the memory.
Best regards,
U2
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JOcean
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December 2nd, 2019 08:00
Thanks for the great information. I have a 5430 and always suspected that there was a simplified method besides an entire teardown. Very helpful pic as well!
U2CAMEB4ME
6 Operator
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6.2K Posts
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December 2nd, 2019 09:00
@JOcean
Over the years I have found many laptops with this option.
The thing I am wondering about is what is the " ME " contacts for???
Best regards,
U2
TheForrest
3 Posts
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November 22nd, 2021 11:00
Did Dell fire the engineers (please!) who thought it was okay to make a CMOS battery this hard to replace? This is why I don't buy or recommend Dell.
sphinxgr
1 Rookie
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3 Posts
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June 29th, 2022 05:00
I tried this and it didnt worked. Bios Password still remains. Is there anything special we have to do? Specific time of shorting or something like that?
U2CAMEB4ME
6 Operator
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6.2K Posts
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June 29th, 2022 06:00
Welcome to the Dell Community @sphinxgr
It only resets the BIOS to default.
It does not clear the BIOS password.
Do a Google search and you will find the way.
Best regards,
U2
Ronaldd12
12 Posts
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June 29th, 2022 22:00
Remove the 2-pin jumper plug. Locate the 2-pin CMOS jumper labeled RTCRST on the system board. Move the 2-pin jumper plug from the password jumper to the pins on the CMOS jumper. Plug the power cable to the computer and wait for 10 seconds for the CMOS to clear.
U2CAMEB4ME
6 Operator
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June 30th, 2022 01:00
Welcome to the Dell Community @Ronaldd12
There is no "jumper plug".
Best regards,
U2
Leechr9
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2 Posts
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November 1st, 2024 13:48
@TheForrest This is an old thread and I've seen similar comments elsewhere. I reopen it because we recycle old computers to give to people who can't afford one. As old Dells including mine tend to be the most reliable, it's reasonable to ask who thought of this example of apparently programmed obsolescence.
On the up-side, the E5530 we have just converted to Linux Mint seems to remember the (changed) BIOS settings provided we don't remove the main rechargeable battery. I'd like to know if this has been documented, and whether (perhaps if we replace the ageing battery) it can be relied upon in the hands of a recipient who should not be troubled by such technical issues.
Finally, is there any way of making a backup of the BIOS?