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Witcher-X

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7 Posts

877

November 1st, 2023 02:35

Power failure on my Inspiron 15-3542 after CMOS battery replacement

Hello everyone

I really need your help..After many years as a happy owner without any problem at all, one day i heard 5 beeps the moment i booted my laptop, so it was time for a cmos battery replacement. I opened it, put a new cmos battery and furthermore i replaced the thermal paste on cpu and gpu and cleaned cpu fan and ventilation holes. Then i succesfully booted up on windows 11. I checked if everything was ok, the device manager to see if all devices worked properly etc. By the way, i use my laptop without battery since the moment i had to buy another one, but i never did it. So everything seemed to be ok (except the sound which was a little bit low than before when i listen to a music track online, but when i play music and video files on my hd, sound seemed normal). So i shuted it off and go to bed. Next morning i couldn't boot my laptop-led power indicator was shut off, but the one in my psu was on. Panic. I put the old battery back on and laptop power led indicator was on again, but nothing happens when i push the start button. What do you think is the cause of this? What do i have to do? Any help would be appreciated, thanks in advance! 

Witcher-X

1 Rookie

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7 Posts

November 4th, 2023 15:58

Update: I managed to lock ribbon cable in its mobo seat and i fixed the touchpad with a weird solution i found on the net: Under Device Manage-Human Interface Devices-Synaptics HID Device I disabled it and restart the machine then enable it again and it worked! Thanks @anyabaker for your post, i consider this issue fixed

anyabaker

1 Rookie

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66 Posts

November 1st, 2023 06:50

There are several possible reasons why your Inspiron 15-3542 is experiencing power failures after you replaced the CMOS battery.

  • Incorrect CMOS settings: The CMOS battery stores the BIOS settings, which are essential for the computer to boot up and operate properly. If the CMOS settings are incorrect, it can cause a variety of problems, including power failures.
  • Loose CMOS battery: The CMOS battery should be firmly seated in its socket. If it is loose, it can make contact with the motherboard and cause a short circuit, which can lead to power failures.
  • Faulty CMOS battery: It is possible that the new CMOS battery you installed is defective. If this is the case, it will need to be replaced.
  • Faulty motherboard: In rare cases, a power failure after replacing the CMOS battery can be caused by a faulty motherboard. If you have tried all of the above solutions and the problem persists, it is possible that your motherboard needs to be replaced.

Troubleshooting steps:

  1. Check the CMOS settings: Restart your computer and enter the BIOS setup. Make sure that the CMOS settings are correct. You can find the correct settings for your computer in the Dell Inspiron 15-3542 service manual.
  2. Reseat the CMOS battery: Remove the CMOS battery from its socket and then reseat it. Make sure that it is firmly seated in the socket.
  3. Try a different CMOS battery: If you have another CMOS battery, try installing it to see if it resolves the problem. If you do not have another CMOS battery, you can purchase one from Dell or another retailer.
  4. Contact Dell support: If you have tried all of the above steps and the problem persists, contact Dell support for assistance. They may be able to help you diagnose the problem and provide further troubleshooting steps.

Here are some additional tips:

  • When replacing the CMOS battery, make sure that the computer is turned off and unplugged from the power outlet.
  • Be careful not to touch any other components on the motherboard when replacing the CMOS battery.

Witcher-X

1 Rookie

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7 Posts

November 1st, 2023 21:55

@anyabaker​ thank you very much for your quick answer! Problem is that i cannot boot up my laptop, so i don't have BIOS access.  When i push the power button nothing happens. Power led indicator is off. It turns on when i put back on the old dell battery but still power button doesn't work. Strange thing though was after the repair the laptop seemed to be worked for an hour, until i turn it off. When i tried to turn it on again, the problem i described occured.

(edited)

Witcher-X

1 Rookie

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7 Posts

November 4th, 2023 13:13

I just figure out that during the repair i attempted, i lost the plastic part of the motherboard which locks the power button ribbon cable, so sometimes laptop boots up sometimes it doesn't. So the ribbon cable doesnt firmly seated in place. Furthermore although touchpad is recognized by windows, doesn't work also.  Seems i can't avoid professional help from a technician..

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