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This is a Dell Latitude device, identified by the model number 7420. It features a carbon fiber case, touch screen, and a finger print scanner to unlock it.

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dell is turning off after 5 sec

Im having problem with my 7420. It turning on after 5 sec. turning off and caps lock start light for about 10-15 sec and turning off .. Does anyone know what can cause that problem??

  1. LED is blinking 3 times orange 6 times white
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Hi @tomaszsikora

On p.80 of the service manual it shows that a 3:6 error code is caused by a Flash corruption detected by SBIOS and the fix is to replace the systemboard.

Try the following procedure to try and reset the BIOS and check if it resolves the problem.

  • Turn on the laptop and wait for Dell logo to appear
  • Press and hold the power button down for 35+ seconds until you see the power light flash 3 times.

Hopefully it will start and boot OK the next time the laptop is turned on.

If not, repeat the last step, download the latest BIOS to a USB Fat32 drive, switch on, keep tapping F12 then update the BIOS from the USB drive.

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Tomasz Sikora crwdns2934231:0crwdne2934231:0
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