Hacking PSP 1001 pandora battery help

[Niliame]

Hi everyone! Today I wanted to get back to my old PSP fat, but I noticed that it does not turn on, the green light goes on once for half a second and nothing appears on the screen (same goes for when I remove the battery and plug it in to the wire). So I decided to follow some tutorial online on how to do create a pandora battery to unbrick the console. I think that I did everything correctly (I found the ICO4 and removed the one in front of the four). I currently do not have a memory card and I wanted to see if that would make any difference to the console when I try to power it on. Now, the green light blinks every second indefinitely. Can any of guys please help me?