When I played on my laptop, it froze briefly, then came a beep code or something like a Morse code (5 times briefly),
What does my laptop want to tell me?
CMOS battery empty
"Five beeps, usually mean there's Real Time Clock Power Failure, which mean that your notebook has a problem with CMOS battery. CMOS battery is located inside computers and notebooks and stores information about real time clock (RTC)."
Google times for "5 beeps". Is a CPU error. That's why he dropped out while playing.
If that were the case, he would not have frozen and crashed in the middle of the game.
No matter what the others tell you here as error analysis: Depending on the motherboard manufacturer, these beep codes mean something different.
Since you do not call him, it would be advisable if someone types correctly.
