My G-tab P1000 shows a blinking PC phone with a yellow triangle and doesn’t come on. What can I do to it?
View the video linked below to know how to troubleshoot your issue -
How to Unbrick Samsung Galaxy Tab P1000
It sounds as though you have hardware locked your phone. It is quite possible that your phone is tricked at this point. Fixing it may be difficult, but there is some guidance at http://forum.xda-developers.com/showthread.php?t=805923.
what you did to get this problem? you flashed with a rom? which one?
Hello can you please provide some more informations? is it still charging ? if it does then while turning on your tablet press and hold bot VOLUME UP AND DOWN BUTTON then choose the factory reset and wipe the data it should work now