My kids PS3 comes on and then when you push play the light turns green and you hear it start up for a couple of seconds and then it goes off.

R - Restore: Restore default settings E - Environment: Change your environment, remove from media cabinet, try different media, try different equipment (TV, router, hotspot, etc.). P - Power Cycle: Power cycle by unplugging your networking equipment from wall for 2 minutes to reset. A - Access this Knowledge Center for useful articles to resolve issues. I - Install the latest System Software Update. R - Resolved: In most cases these steps can resolve your issue.
Adjust the video input on the TV to match the input connector that is being used to connect to the PS3™ system. Check that the cable is securely inserted. Try disconnecting the cable from the PS3™ system or TV and then reconnecting it. There may be a problem with the AV cable in use. Try using another cable that is compatible with the PS3™ system. If the video output settings on the system do not match those of the cable or TV in use, there may be no picture. If the screen goes blank, turn off the system. Then, with only the system and the TV connected, touch the system’s power button for more than 5 seconds to turn the system back on. The video output settings will automatically be reset to the standard resolution. If the resolution of the video content is not supported by the TV in use, when the video is played the screen may go blank. If this happens, go to the screen for selecting the resolution in the system’s video output settings, and then select all the resolutions that are supported by the TV.