IBM Laptop Screen Won't Turn On?

I have a older Imb laptop modle T23 computer and when I shut it down rather then using standby it takes several times trying to get it to come back on. I press the little round on/off button and the (z) button lights up and I hear the fan turn on and all of a sudden a series of beeps, and the screen won't turn on. The beeping is like 8 beeps, then stops but still nothing come up on the screen. Completely black! So i turn off the computer again, and turn on same thing. I continue doing this like 30+ times sometimes more sometimes less, then finally the beeps dont start and the screen is working. So needless to say its still working in the mean time, but its just such a pain if I shut it down. . For now I am just going to continue using standby but when I have updates sometimes i need to shut down.