(adsbygoogle = window.adsbygoogle || []).push({}); Ok so im using a iphone 3g to downgrade i installed the firmware in the ps3 by the service mode shit and now when i try to turn the ps3 on it shows the green light for 5-10 sec then it goes red? whats wrong plz help its not my ps3 its friends.

This means the PS3 is bricked sadly you must of picked up a FAKE version of PSGrade only fix is send it in. Sadly they will not fix it due to you trying to hack there system.

Your joking

Does the PS3 start when you don't try this?
E.g. normal start
Sounds like YLOD which is a hardware failure not linked to this

what u mean doing try this i try to downgrade i installed the firmware and i tryed taking out the power cable and switch off the button and then when i click the red button it shows the green light for some sec and then it goes red again

yeah im not jocking bro happened to me... and they wont fix it. there are cheap 3rdparty shops that will fix it thou just use google

ill wait for more answers

Stop trying to downgrade and see if the PS3 starts like it would. Right now it sounds like your PS3 kicked the bucket not due to JB or downgrade.

If it does not start you found the problem is YLOD, if it starts ok then it time to look at what your doing what could be going wrong.

I am not trying to downgrade im trying to start the ps3 not working

PS3 got YLOD then if it won't start and your not doing any downgrade stuff.

Just to let you know.....sony can't tell you been trying anything funny stuff with it.
Now you can do 4 things
Fix it
Move to Xbox
Send to sony for a fixed PS3
Buy a new one

As YLOD a general calling card fixing it one way may not fix it. What am saying there no sure fix it depends case by case.
Also fixing it may mean another failure soon unless you replace all the parts which failed.

Data on the HDD also gone , unless you had a backup even some of that data won't be moved over. E.g. copy protected saves.