Battery indicator flashing white twice - POST problem

Welcome to the Dell Community   @SteffEvans27 

Hold down the "D" key, push the power button, release the power button, wait 2-3 seconds and release the "D" key

The laptop should go through an LCD test of solid White, Red, Green, Blue and Black 2 or 3 times.

After completion it should try to automatically boot 2 or 3 times.

Post your results.

Best regards,

U2

Thanks for replying so quickly.

Another slight problem I have is that the screen doesn't work. I've been using it with a monitor for the past two years with no problems at all. 

I tried your suggestion and it didn't seem to do anything. However, I did notice that the number of battery indicator flashes depends on how long I hold the power button down. 

If I press it once then it only flashes once.

Holding it down a bit longer means two flashes and so on.

Thanks

Update: Battery is now showing as fully charged.

When I try and turn it on, the white indicator comes on, remains solid for a second and then goes off.

So doesn't appear to be flashing as I previously thought.

@SteffEvans27 

Now would be the time to Disconnect the AC adapter and the "Main" battery.

Then press and hold the power button for 10-15 seconds.

Post your results. Regards,

U2

Removed the ac adapter, took the back cover off and removed the battery. Held the power button down for 15-30 seconds.

Tried it with just the ac adapter and it was the same problem so assuming I can rule the battery out for now?

Put it all back together and the issue still persisted. When I push the power button the battery indicator turns white for a few seconds but then disappears. 

Thanks

Any Change? Same issue here. 

Any resolution yet?  Running into the same issue with a 3390.

@U2CAMEB4ME​ Pressing the power button and the D key stopped the double blink but the LCD test did not take place. 

I also disconnected the AC adapter but nothing seems to happen.