3.52 m33-4 loading problems

hi all
this is my first post so please be patient
i recently ran the key cleaner on my phat psp-1000
with a ta082/86 m/board running 3.52m33-4
the key cleaner came back with many faults that is automatically sorted out
i also manually fixed key 41 ( impressed myself with that one )
but i think i have dropped a fatty by changing key 5 by mistake
it was working ok until my son turned it off last night
now it wont come back on black screen with green power light on
even recovery mode wont start
is there a way to fix or do i need a pandora battery and magic stick
reason for cleaning my keys was trying to upgrade to 3.71m33
what is the best m33 to run as 3.52 freezing alot
any idea's people
thanks in advance
daz

Ok, it sounds like you have a brick. Get yourself a pandora, and when you update to 3.71m33 it [I]auto-corrects[I] key 5.

Right now i'm on 3.71m33-4 and its pretty good, there are also a lot of good things about 3.90m33-2.

what is the most stable for playing iso's
can i go direct from 1.50 to 3.90m33 or do i have to go via 3.71m33

If your going from 1.50 you need 3.52m33-4 first and then go up to 3.90m33, As for iso's we cant talk about them as it is against forum rules, you will have find that out from somewhere else.

thanks for the info
will get a pandora battery and magic ms and go to 3.90m33
cheers
daz