First please calm down. Please post the following details.
What is the printed serial on tge bottom of your pimax headset? I presume by your mention of firmware 248 your serial begins with 102.
@sjefdeklerk has made a modified firmware for the 100 serial that folks have used to reset their 102 then reinstalled firmware 248.
If you can provide some details on your setup.
Windows version ie win10
If Win10 run winver in 'run option in start menu' include the build info. Some are experiencing issues with the Creator's update in windows.
Also please post
Gpu & driver version
Piplay version you are using.
@PIMAX-Support - this will help support see your message by sending him a notification.
Lastly i have edit your topic content.