Hacking help please ... vwii wont start the wii mode

[romanticovero]

it was working fine and then when i start the wii menu the console shit off without go the the wii menu THANK YOU FOR YOUR HELP
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[Bug_Checker_]

it was working fine and then when i start the wii menu the console shit off without go the the wii menu THANK YOU FOR YOUR HELP
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Please Do NOT take this the wrong way. But it is almost impossible to help on a request like this without a complete history. There is just not enough details. Waaaaaaaay too many assumptions have to be made.

Paint us a detailed picture.Tell us a complete story.

Here are some useful info that might help.
what wiiu is it? white/black/8gb/32gb/bundled special
wiiu region type
bought new or used
Is it under warranty?
Have you voided warranty?
Started with x.xx firmware
upgraded to what additional firmware(s)
ANY problems with ANY upgrades?
had exclusive control over unit or brother/cousin/dog/troll could have messed with it.
you did what to it?
EVERYTHING that was extra (over a normal unmodified unit)
ANY problems which were noticed (EVER)
What Accessories have you used with wiiu/vwii?
What software have you installed?
Did you make a NAND backup?
Can you enter vwii through maintenance mode?

you can try this, may not work but may be worth a shot. when starting up wii mode hold + and - on wii remote and when black health screen pops up it should stick you in maintenance mode. Try to check the channels menu in system menu, see if there any corrupted ones, they may show as a "?"

Make a new or 1st time NAND backup with Dump Mii NAND
Dump Mii NAND - a BootMii format (nand.bin) NAND dumper for vWii/Wii
Run SysCheck SysCheck HacksDen Edition
Run InspectMii InspectMii, NEW Wii/vWii Homebrew
Report back.