I don't get a Grub menu after I converted my MBR to GPT. I booted with SuperGrub2 disk to check the partitions. Everything is correct. I tried the usual steps again.

Code:
update-grub
grub-install /dev/sda
And it said that GRUB installed without any errors. But I still see no Grub menu during boot. I installed grub-efi-amd64 and retried but no change.