Hello and welcome to justanswer. My name is***** will be assisting you today. I am sorry to hear that you are having such trouble.
Please remove the battery, disconnected it from the power adapter, hold down the power button for 30 seconds and then placed the battery back in and the power adapter and try to power it on again.
Please let me know
Can you please tell me what Operating system you have?
Please tell me the model of your Toshiba
And try this
Take the battery out and put it back in. Then press shift, F8, and the power button at the same time
This can be due to faulty ram
Can you please check how many ram modules is installed?
Please remove the module and move it to another slot and test.
If there's 2 remove one at a time and test with only one installed.
Please see link provided on how to get to the ram modules