Problem with grub escue

Hello, I have a problem with some equipment, especially a probe. Indeed, when I start it, it goes into "grub" mode directly. This means that the bone does not charge. So I checked with "ls, ls-l ... ls / tab" to see where is my "kernel" bone which should normally boot at boot time. After several searches, they are located in a lost/ found file... and when I force a bot on lost/ vmlinuz-2.5.34-6 it tells me "no loaded kernel". So I can't get out of this damn grub mode and boot on kernel. Thanks for your help... (screenshot if needed)