What should i do?i upgraded my psp software to v4.05(from official site). once the upgrade was done, i can no longer play my games,others like music and videos are ok. please help i can no longer play my cso files. also i dont know how to check for my firmware.
thanks
Official Firmware can not play iso,cso or such. Never upgrade to a official firmware! Only custom firmware can play iso and cso. The only way to get back to custom firmware is to use the Pandora Battery
To downgrade (and get a custom firmware) or unbrick your PSP, you need the Pandora's Battery. There is three ways to get the Pandora Battery.
1. Find a someone who has a Custom Firmware that is willing to let you borrow their psp. You will use their psp to softmod the battery. Meaning using software to make the Pandora. If you willing to do this, follow this guide:
GUIDE
2. Hardmod the battery. Meaning that you have to open that battery up, and pulling out a pin. Note that if you pull the wrong one, your battery would be messed. If you are willing to do this, follow this guide
GUIDE
3. The most safest way, is to buy a premade pandora battery from the internet (use google or ebay).If so, follow this guide or use the same guide on the second step. I recommend buying from DealExtreme for $10.
GUIDE
