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The Dell Latitude E5550 is a 15-inch business laptop. It was first released in late 2014 with a 4th-generation Intel processor and subsequently updated in early 2015 with a 5th-generation Intel processor.

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Dell E5550 Powers on when plugged in or battry is plugged in.

I have a Dell E5550 that powers on immediately, either when the battery is plugged in or if I take out the battery it does it when I plug in the AC. The power button comes on but pressing it does nothing. I have replaced the battery, CMOS, power button and reseated the HDD and Ram. Nothing fixes it. I can put it to sleep when I close the lid but I would like to have full functionality.

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Hi,

Have you checked that the laptop is actually off and not just in sleep mode or hibernation?

Try holding the power button until the laptop shuts down completely and then check what happens.

Have you checked all the sleep setting options in Control Panel > Power Options > Change Plan Settings > Change Advanced Power Settings > Sleep to make sure that they’re what you want?

Update (04/01/2020)

@James Pontius ,

Did you check the Advanced Power Option sleep settings, you didn't say?

Did you check any of the settings in the Power Management section of the BIOS e.g. AC Behaviour - especially wake on AC or Wake on LAN/WLAN, Auto On Time or USB Wake support to see if they may be set so as to cause the problem?

Here's a link to the owner manual scroll to p.50 to view the default settings for all the above Power management settings.

Did you try a power refresh to clear the BIOS back to default values.

This should have happened when you replaced the CMOS battery assuming you had the main battery out at the same time but maybe you were too quick.

Try removing the charger (if connected) the main battery and the CMOS battery and then hold the power button operated for 30 seconds to dissipate any residual power from the laptop and then release the button. Replace all the batteries and then check what happens

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The laptop, powers on automatically when the battery is reconnected after being taken out. The power button doesn't do anything other than light up, which I have replaced with three different ones.

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If your Dell Latitude E5550 only powers on when it is plugged in or when the battery is plugged in, it is likely that the battery is not holding a charge or is not being properly detected by the laptop. Here are a few steps you can try to troubleshoot the issue:

  1. Check the battery contacts: Make sure that the battery contacts are clean and free of any dirt or debris. Use a soft cloth or a cotton swab to clean the contacts.
  2. Calibrate the battery: Try calibrating the battery by draining it completely and then fully charging it. This can help to reset the battery and improve its performance.
  3. Update the BIOS: Updating the BIOS can sometimes help to resolve issues with battery detection and charging. Visit the Dell website to download and install the latest BIOS update for your laptop.
  4. Replace the battery: If none of the above steps resolve the issue, it may be necessary to replace the battery. Contact Dell customer support or visit a Dell service center to purchase a replacement battery.

It's important to note that attempting to replace the battery yourself can be dangerous and may cause further damage to your device. If you are unsure of what to do, it's best to seek professional help.


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James Pontius crwdns2934231:0crwdne2934231:0
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