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July 15th, 2025 23:56

m18 R1, just shut down and blinks 3 red 5 blue

Hi, my laptop just shutdown and now he blinks 3 red 5 blue. What does mean and can i fix it somehow? Thanks for reply.

10 Elder

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28.6K Posts

July 16th, 2025 00:47

3,5 is a power rail failure.  Since the system is new enough to be under warranty, contact Dell support to have the mainboard replaced.

5 Practitioner

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1.6K Posts

July 16th, 2025 05:25

On the rare occasion, a power reset can fix your issue. Unplug the power adapter and hold the power button down for 60 seconds and then try to boot. If this doesn't work, try unplugging the system battery and try the power reset again. Check the service manual for the m18 R1 to show you how to safely unplug the battery.

If neither of these options work then you will have to open a support ticket, hopefully you still have warranty. 

m18 R1 Service Manual

1 Rookie

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5 Posts

July 25th, 2025 01:33

I'm having the same issue, trying to get support about it

10 Elder

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28.6K Posts

July 25th, 2025 10:52

If the system is under warranty, simply call Dell support. 

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