Toshiba equim when i power on it will try for about 3 seconds, fan runs and you can hear it starting but then it just cuts out,any help greatly appreciated

a problem has arisen in the converter panel /board
take it in for a proper diagnosis and repair

Hmmm, I'd suggest that your PC "may" have screen issues.
Try connecting an external monitor & then re-start the PC.

Try removing the battery and starting it up with only AC power.

Sometimes it doesn't charge properly and will turn off after a second. Removing the battery will sometimes fix this.

Make sure you are getting charge lights as well. If the AC adapter isn't working anymore, it can cause exactly what you're experiencing.

Please leave feedback if you found this helpful. Thanks.

download and install the audio driver from your computer manufacturer's website then restart your computer.

Try removing / swapping / reseating the memory.

Try booting with one stick only, if the top slot doesn't work, try booting the bottom slot. Try both sticks.

Let me know what happens.

Dear Sir,
Try this, remove the power plug and battery, wait for five minutes and plug the computer to power with out the battery and try to start it.

check that the cooling fans are working. if they are not then you are probably triggering the thermal overload protection.

Do you hear the fan come on? Do you hear the hard drive spin up or notice the hard drive light come on? I relaize it may be a short spurt.

you may have a faulty motherboard connection, but try connecting the power adapter in without the battery and see if it runs, then replace the battery back in the compartment.