Check the white coax cable is finger tight at both ends. Press and Hold the Power button until you see the Word STOP on the display and let it reboot.
It it still gets stuck at LD30 then post back as you may have signal issues as LD20/LD30 are the first part of the boot process.
Welcome to the community and thanks for posting. I'm so sorry to hear your box is stuck on error code LD30.
I see others have given you some great advice already.
I've managed to locate your account to run some tests. I can see the V+ box is currently showing as on standby. Can you confirm if the error code has disappeared?
Please let me know and I'll happily help further.