Long time since I last wrote about PSP here, so to catch up I'll tell you a thrilling story of suspense.
As you know, I updated my PSP firmware to 3.02OE when I've heard about all the marvelous possibilities it opens (meaning PSX emulation). A few days later Dark_Alex released another version of his custom firmware, version 3.03. Its two main features were fixing a bug regarding region-free UMD playing and adding support for compression in PSX isos.

As you can see on the image above, I finally managed to do it. Unfortunately, after launching the firmware update I was soon confronted with a bricked PSP. Imagine my horror when I saw that after turning it on there was nothing but black screen and only Memory Stick access diode would keep blinking...
(plus, I was about to fly to States and would be deprived of gaming on that long flight - scary)
If it happened to you too, don't worry. If that little green light still blinks, it means that your system is not dead yet. It is not actually even bricked, but semi-bricked, so to speak. Think of it as a coma, rather than death. Click below to read detailed instructions on how to restore your firmware.
First of all, you should have used original Dark_Alex firmware, not one of these stupid easy installers. If this is not the case, download it here.
Secondly, you will need to unpack the RECOVERY folder that is included in 3.02 OE-A zip file. You'll also need to download the 1.50 firmware,rename it to UPDATE.PBP and put it in the RECOVERY folder. Perhaps you have already prepared all (or some) of it, but not necessarily (especially if you had used one of the abominable easy installers) and if you did not, now is the time to do it.
Thirdly, connect your PSP to your PC using the cable. You then need to reboot your PSP holding down R button - you should see a recovery menu. Find Toggle USB option and click the button. Now your PSP is connected and you should see the contents of Memory Stick as a new USB drive (I will refer to it as X:, but in your case it is probably some other letter, so use that letter instead of X).
Consequently, copy the RECOVERY folder to /PSP/GAME folder on Memory Stick so that you have X:/PSP/GAME/RECOVERY. Then in the recovery menu choose option Run program at /PSP/GAME/RECOVERY/EBOOT.PBP. Everything should be good now (so it was in my case).
If you still get a black screen after that, well, that's more complicated. I didn't have that problem, but while googling, I found this piece of information :
I cannot guarantee, however, that it is 100% accurate. I quote it here nevertheless, because maybe someone will find it useful.
If the above instructions helped you, please let me know via comments.
As you know, I updated my PSP firmware to 3.02OE when I've heard about all the marvelous possibilities it opens (meaning PSX emulation). A few days later Dark_Alex released another version of his custom firmware, version 3.03. Its two main features were fixing a bug regarding region-free UMD playing and adding support for compression in PSX isos.
As you can see on the image above, I finally managed to do it. Unfortunately, after launching the firmware update I was soon confronted with a bricked PSP. Imagine my horror when I saw that after turning it on there was nothing but black screen and only Memory Stick access diode would keep blinking...
(plus, I was about to fly to States and would be deprived of gaming on that long flight - scary)
If it happened to you too, don't worry. If that little green light still blinks, it means that your system is not dead yet. It is not actually even bricked, but semi-bricked, so to speak. Think of it as a coma, rather than death. Click below to read detailed instructions on how to restore your firmware.
First of all, you should have used original Dark_Alex firmware, not one of these stupid easy installers. If this is not the case, download it here.
Secondly, you will need to unpack the RECOVERY folder that is included in 3.02 OE-A zip file. You'll also need to download the 1.50 firmware,rename it to UPDATE.PBP and put it in the RECOVERY folder. Perhaps you have already prepared all (or some) of it, but not necessarily (especially if you had used one of the abominable easy installers) and if you did not, now is the time to do it.
Thirdly, connect your PSP to your PC using the cable. You then need to reboot your PSP holding down R button - you should see a recovery menu. Find Toggle USB option and click the button. Now your PSP is connected and you should see the contents of Memory Stick as a new USB drive (I will refer to it as X:, but in your case it is probably some other letter, so use that letter instead of X).
Consequently, copy the RECOVERY folder to /PSP/GAME folder on Memory Stick so that you have X:/PSP/GAME/RECOVERY. Then in the recovery menu choose option Run program at /PSP/GAME/RECOVERY/EBOOT.PBP. Everything should be good now (so it was in my case).
If you still get a black screen after that, well, that's more complicated. I didn't have that problem, but while googling, I found this piece of information :
You'll also need the systemctrl.prx file for 1.50. Google for it. Then when in recovery mode: toggle USB and place the systemctrl.prx file in X:/REFLASH, go to advance options and choose Flash->Systemctrl (1.50). When done, go back and try to run the recovery option again. If it works, you'll be in firmware 1.50 again, then you can try reupdating again.
I cannot guarantee, however, that it is 100% accurate. I quote it here nevertheless, because maybe someone will find it useful.
If the above instructions helped you, please let me know via comments.