Black screen after i reboot ubuntu 18.04

nvidia-but-report.log.gz (682.3 KB)
linux-kernel is 5.4.0-42
nvidia driver is 465.19
This is the PC provided by the school with the new graphic card RTX3070,
but it still has some problem. Last week, i use it nomarlly, then i off it on last Friday, when i back this Monday, black screen appear when i boot it.
@generix please help me, thanks in advance

May 10 10:27:42 comsc-ISRMOT-220 kernel: [    4.107253] NVRM: GPU 0000:01:00.0: RmInitAdapter failed! (0x26:0xffff:1242)

Sorry, looks broken. Please check with vendor or your school to have it replaced

Thanks, i will email the school.