Are you able to start up your Alienware laptop? If not, I found this article that may be able to help you. https://www.dell.com/community/Alienware-General-Read-Only/Alienware-Alpha-wont-startup-Flashing-yellow-light-5-times-FIXED/td-p/5555507 If this doesn't work, I suggest you call Dell Support.

i got one too but everywhere i google it wont tell me exactly!! mine is the alienware m16r2 and the power button is jus straight up yellow wit no blinking. does anyone know what this means cuz ive searched everywhere

For users returning to this thread, the flash code of 4 amber (or blue in this case), 1 white or a constantly flashing amber light would be indications of a Temporary Battery Failure. The 4,1 code in particular would be due to 2 possible reasons. Either the battery has become too hot and has shut off the charging function to try to cool down the battery, or the computer has experienced an Over Current Protection event while charging and has shut off charging temporarily to protect the computer. Both of  these scenarios are recoverable. However, the computer does not charge until the Temporary Battery Failure condition has been removed. This is working as designed to protect the computer. Use the following steps to recover the charging capability of the computer and stop the blinking LED code from being displayed: Reseat the AC adapter. This can be done by disconnecting the AC adapter for ten to fifteen seconds and reconnecting it to the computer. If the Over Current Protection circuitry has triggered this, it resets the protection and resumes charging If the battery has gone above its thermal threshold, move to a cooler ambient temperature environment and wait for the computer to cool. Once the battery temperature has decreased, the computer should resume charging. If still unresolved, remove the bottom cover and reseat the battery cable to the motherboard.  Run the diagnostic to see if there is an error code for the battery Shutdown the unit Hold down the Fn key and the power button together A quick test should start. Make note of any errors if any If still unresolved, test with a known good OEM battery if available  See this video for additional battery troubleshooting.  Contact Dell GHN (Get Help Now) chat technical support Monday through Friday. Click the blue 'Get Help Now' on the right to start a private live chat session. Share the private Service Tag with them so that they can verify the ownership and warranty status. This will also generate a unique Technical Support case for your unique Service Tag. If already out of warranty, click here for the Dell out of warranty offerings.

It means the battery is charging

In Alienware Command Center, you can adjust the color of the power button while charging or on battery. Typically, it blinks Blue and Orange when charging. However, you could change the color to something else, like yellow. So, maybe check the FX tab, and try adjusting the color settings. 😀

Thank you for the reply, and yes I am aware that I will need to change the case and PSU, most of the testing I did with the original memory and the only USB devices that where plugged in where mouse,keyboard and the thumb drive when it didn't work without it (just pressing CTRL+ESC). Didn't try doing the reset without the battery so I'll try that this evening when I get home.

This is the charging indicator on my m15.

RAM failure.