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Help! Cant play iso/cso file after updating to 3.90 ver

Discussion in 'Sony PSP - Mod and firmware discussion' started by ronnnzzz, Feb 20, 2008.

  1. ronnnzzz

    ronnnzzz Guest

    hi
    i am using psp 3.71 version of firmware then i went to upgrade it to 3.90.... Now i cant play cant play iso/cso file with the new ver. Is there is any method that i can "downgrade" back to my previous ver.. I try to restore to default setting but the 3.90 ver is "still here".. I just bought my PSP slim last week, and I am very new to this yet.. hope someone can help me... thanks alot..
     
  2. Dr1ver

    Dr1ver Regular member

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    this is 3.90m33
     
  3. 07anto07

    07anto07 Regular member

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    if this is official firmware u will need a pandora battery and card.

    if it is 3.90m33 do this boot into recovery by holding the L button a menu will apear scroll to config then scroll down to umd mode press X till m33 driver no umd comes up then press back then exit now try ur games they should work.
     
    Last edited: Feb 20, 2008
  4. ronnnzzz

    ronnnzzz Guest

    Thanks for replying.. But I still cant solve the problem, nothing happen when i hold on the L button when switching on the power.
     
  5. Dr1ver

    Dr1ver Regular member

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    your using the official 3.90 fw and not 3.90m33
    to check this got to system setting and then sytem information it should say 3.90 or 3.90m33
    you said you where on 3.71 and now you updated to 3.90 you cant play games; does this mean that you had 3.71m33 and where able to play iso's on it?
     
  6. 07anto07

    07anto07 Regular member

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    this is official firmware u will need a pandora battery and card
     
  7. ronnnzzz

    ronnnzzz Guest

    thanks 07anto07 and dr1ver

    yes,my previous firmware is 3.71 m33 ver , the 3.90 ver is dl from uk/playstation.com. the problem is solved already. my fren had help me to bring to Sim Lim Sq (spore) to reinstall back the 3.71 m33-2 ver.
     
  8. nixz

    nixz Regular member

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    Wait! You're holding the wrong button when turning on your PSP! You need to hold the R Trigger (Right Trigger) when turning on the PSP to access the recovery mode.
     

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