Ok, you were on HEN, you'll have to re-enable it and run Recovery Flasher to install PSP (if PSPIdent says you have a hackable motherboard).
Do you have a connection set up? If you upgrade to CFW they are taken out and you have to set them up again.
Search for a program called "PSPIdent" and run it on 5.03 ChickHEN. Check what is displayed in "motherboard model".
You have an unhackable motherboard, and you have attempted to hack it :( I'm afraid the PSP is bricked...
Go to System Settings < System Information. What does the Firmware Version read? I'm a little confused as to whether you were on CFW or just HEN...
Upgrade all the way up to OFW 5.03, then use 5.03 ChickHEN R2 to run "Hellcat's Recovery Flasher" to install 5.00 M33-6.
The UBB codes don't work :(
Wait, you had CFW? I thought you just had HEN enabled?? If you have HEN enabled, you can run homebrew but you're still on OFW. I'm talking...
Yes, if you're running CFW, you can play ISOs and CSOs. If you haven't updated your PSP ONCE since you bought it then you can go to System...
What happens when you try to view the image? Does your PSP freeze up and then shut off, or does nothing happen at all?
Hmm....I don't know, I guess you could give Pandora a try but if it dosen't work, it dosen't work.
If you turned it off and it became un-modded, that means it had HEN (Homebrew Enabler) enabled but it wasn't running CFW. You'll just have to...
Since you said it's an older PSP, I assume it's a PSP-1000, so use the PSP MAX Power TOOL, unless you want to convert your battery to service mode...
LUA is definitely easier and quicker but you can do a lot more with C++ (or C for that matter).
Separate names with a comma.