Unable to turn on my PSP


So mr lim was playing a game halfway but had to do some important stuff so he set it to standby mode.

After completing his stuff which took about 30 minutes, he tried turning it on and there wasn’t any response, no green light, no nothing.

He hooked it up with the adaptor and the amber light came on but still, unable to switch it on.

He tried taking out the battery and the amber light went away.

He also tried with the battery and without the UMB, memory card but it made no difference.

From the looks of it, it doesn’t appear to be bricked (right?).

He upgraded his PSP Firmware to 4.01 M33-2 about 1-2 weeks ago.

Any help lazy web?