Well i waz installing an update and i took the ac charger out and all of a sudden it froze and not when i try to cut my psp go on the light cme on green but the screen stays black and it can charge

You'll need to buy...

Magic MS + Pandora Battery!

..from somewhere online. Quite inexpensive!

take off the battery and try again. If this doesn't help then the copy of the mlb game is defective.

Or you can just update your PSP through your computer (if you have internet)

Here's a link.
http://www.us.playstation.com/Support/SystemUpdates/PSP/PC.html

if u just resently purchased ur psp this will occur.
sometimes its ur psp version try updating the system.
and if u are playing the psp with the charger pluged in and the battrie is full it will turn off from the charger try all the things i just said and it should'nt turn off.
it happend to me because i was using the charger on a full battrie

Hi! TRY THESE TO SEE IF WE CAN GET YOU POWERED UP! :)



Confirm the system is not in HOLD mode
Make sure the PSP system is not in Hold Mode (in the down position). Slide the Power/Hold switch up to clear Hold Mode. Or try sliding the Power/Hold switch up and holding it there until the power indicator light turns off and the PSP system is completely turned off. Then try turning the PSP on again.

• Confirm the backlight is ON
  Make sure the LCD screen's backlight is not turned off. If it is, press any button to turn ON the backlight.
  
  
• Confirm use of only licensed products (AC Adaptor, battery pack and charger)
  The AC Adaptor, battery pack and battery charger must be licensed for use with the PSP system. All licensed products for use with the PSP will have the following logos displayed directly on the product and/or the packaging:
  
  If any of the products you are using does not have these logos on them, we recommend that you immediately discontinue the use of these products, as they void the PSP system's warranty, and can cause damage to the system. See compatible peripherals for the PSP system for a full list of supported products.
  There are some products that can be used with the PSP system that may not display our logos. Products such as San Disk 1GB Memory Sticks, or various USB cables, needs only to be genuinely certified. Look for the genuine certified logos on these products or contact the company which manufactures these products for more information.
  
  
• Confirm the battery pack is correctly inserted
  Make sure the battery pack is in its proper position (see inserting the battery pack for details).
  
  
• Try the battery pack only
  Unplug the AC adaptor from the PSP system. Make sure a charged PSP battery pack is inserted inside the PSP system. Turn on the unit. If you get power, then the problem may be with the AC adaptor and power cord.
  
  
• Try the battery pack in a different PSP system
  If possible, try your PSP battery pack in a different PSP system. If your battery works on a different PSP system, it may indicate an issue with your PSP system.
  
  
• Try a different PSP battery pack
  If possible, try a different battery in your PSP system. If a different battery pack does work on your PSP system, it may indicate an issue with the original battery pack.
  
  
• Try the AC adaptor and the PSP battery pack
  Insert the battery pack and plug in the AC adaptor. If you still do not get any power, your PSP system may need to be sent in for service (see PSP Service for details).
  
  
• Try the AC adaptor / power cord only
  Turn off the PSP system, unplug the AC adaptor, and remove the battery. Now plug in the AC adaptor to the PSP system with the battery removed. Confirm the AC adaptor and power cord are firmly connected to each other. Now make sure they are also firmly connected to the PSP system and the electrical outlet.
  If the PSP system powers on, the battery may need to be replaced.
  
  
• Check AC adaptor and power cord for damage
  Visually inspect the AC adaptor and the power cord for damage. Do not use if frayed, cut, or damaged in any way.
  
  
• Check the electrical outlet
  Confirm the electrical outlet that you are using is active (receiving power). Try using a different electrical outlet.
  
  
• Try a different AC adaptor and power cord
  If possible, try a different AC adaptor and power cord. If a different AC adaptor and power cord does not work, the PSP system may need to be sent in for service (see PSP Service for details).
  
  
• Confirm no unauthorized system software or downloads were used
  Confirm that you have not used any unauthorized system software updates or downloads on the PSP system. Use of such unauthorized firmware updates voids the warranty and can damage the PSP system.
  
  
• WLAN turned off
  Make sure the wireless (WLAN) network function is not in use while charging. The battery pack cannot be recharged when the WLAN function is being used.
  
  
• Power surge
  If you experienced a power surge, shortage, or a lightning storm in your geographical area recently, this may have affected the PSP system's power supply. Please contact Consumer Services below for information.

Hi,

What hapenned to all your PSP's is that they 'bricked'. When your PSP is installing an update and you interrupt the process, the data where the PSP's operating system (=firmware) is stored got corrupted (=broken). In very rare cases this can happen when you play a game and something goes wrong due that game. When your PSP is bricked the green lamp is on but the screen stays black.

Now straight to the point..The solutions:

1.If your PSP 'bricked' because you interrupted a system update (Powered off while updating, canceling update..), then you can only help it by re-installing the firmware correctly. NOTE: This is unsupported by Sony and is something you do on your own risk, for a usual PSP user it is a complicated process and i suggest you should let someone with experience do it. If you still want to attempt it, for example here's a tutorial for making a 'pandora battery' : http://www.youtube.com/watch?v=ZKFnuCfTPZo
To find more information about this subject you could seach on google for tags like 'psp pandora mod custom firmware jigkick'

2. If your PSP suddenly doesn't start up after or while you played a game, then you have a chance that you can recover your PSP without too much hassle. Simply let your battery run empty. After it's empty, remove the battery and let your PSP 'rest' a day without battery. After that, reinsert the battery, first fully charge it, and THEN start your PSP up (after your battery is fully recharged). If you have luck you might have your PSP working again.

3. Contact Sony and explain the situation. Explain that you did nothing wrong. If your PSP is still under warranty they should help you..

Good luck and if i helped you please leave feedback! Thanks

buy a new one

The polarity of the charger you used is wrong or the wrong voltage, and has messed up the programming n the battery.  You may be lucky if you get a new battery and use the Right charger, It might fix it.  Sony put a battery in the PSP that has a memory chip in it, and I think it will automatically disconnect if the wrong vooltage hits it, or wrong polarity. be warned that I have seen where someone got a new battery and it did not solve the problem. If this happens to you Contact Sony at the following number.

SCEA Consumer Services
1-800-345-SONY (7669)
Monday - Saturday 6:00 AM - 8:00 PM PST
Sunday 7:00 - AM 6:30 PM PST

It is strictly prohibited to remove the battery or unplug the AC adaptor or remove UMD disc while the update is in progress and you had done the same mistake. now your PSP is bricked. it means your PSP is useless untill you replace motherboard of it with a new one. your PSP Operating system in motherboard is crashed.

Try undoing the update/firmware.

did you buy this game abroad?