If you screen does not turn on, you may be tempted to this the LCD is dead or a cable has been cut. However, usually the problem is with something on the motherboard and often you can fix it yourself.
Below is a list of Dell flash codes that you can see on your computer, usually on or near the power button that will help you diagnose the issues.
|White Flash Count||Amber Flash Count||Failing Component||Failure Description|
|1||3||RTC power failure||CMOS battery failure|
|2||2||BIOS ROM failure||System board failure (included BIOS corruption or ROM error)|
|2||3||PCI/video||PCI or video card / chip failure|
|3||2||Memory||No memory/RAM detected|
|3||3||BIOS recovery 1||Recovery image not found|
|4||3||BIOS recovery 2||Recovery image found but invalid|
|5||2||Memory||Invalid memory installed|
|5||3||Power||Power sequencing Failure|
|6||2||Chipset||System board / chipset error|
|6||3||BIOS||Flash corruption detected by SBIOS|
|7||3||Board||Time out waiting on ME to reply to HECI message|
In my case I had a Dell Latitude 5300 2-in-1 with a flashing LED located at the very front of the laptop (just under the mouse track pad). It was flashing 4 white then a pause then 2 yellow in a rhythmic fashion over and over again. That code is a “4 and 2” or a “2 and 4” depending on how you look at it and that told me the memory was bad. I unscrewed the back of the laptop, pulled the back off, pulled the RAM and moved it to an open memory slot. This took about 4 minutes and all is well. In my case, I likely could just have used the same slot and simply reseated the RAM but it cost nothing to move it, so I did.