Lenovo ThinkPad T60 goes to blank screen at random intervals.

SOURCE: my R51 thinkpad screen keeps flickering

Sounds like the lcd is toast.

Hook the laptop up to an external monitor and see if you get normal video. If you do, chances are it's the lcd. You'll have to replace it.

SOURCE: Thinkpad T23 screen problem

If you take the casing apart on your monitor and pull the chip out gentley, look at the ribbon wire that goes from the monitor to your computer. It may be cracked from opening and closing. That is what was wrong with mine and it sounds like we have the same problem. I had to use another montintor until my tech group could get me a new one. Hope this helps.

SOURCE: IBM T40 Laptop screen goes black, will not come back

First of all, you have to check whether you can see video signal with surrounding light tilting the screen.
If you can see dim image, all you have to do is replace back-light inverter or fix it. Usually, the fuse is open and you can connect it by simple soldering.
If you can't see dim image, it is another problems.
Give it a try.

SOURCE: hand-me-down IBM Thinkpad 600E 2645 has blinking LCD video XP O/S

This sounds to me like either your flourescent lighting tube is beginning to go bad ,,, or the inverter is going bad ... or even both. :-)

The cheapest and easiest solution for you is to simply replace the LCD screen (replacing the inverter or the tube are actually a bit cheaper, but not quite as easy to do - most computer repair centers will try to talk you into a new screen anyway). This is actually very simple for either you or someone you know who is an avid "do-it-yourselfer". IBM makes ity very easy. You will find easy, detailed instructions in the ThinkPad 600/600E (2645) Hardware Maintenance Manual, IBM S10L-9619-03 June 1999 available for FREE downloading in .pdf format on IBMs website. Follow this link to some really sweet deals on LCD screens for your 600e on eBay for under $35.00. http://shop.ebay.com/items/?_nkw=ibm+thinkpad+600e+lcd+screen&_sacat=0&_trksid=p3286.m270.l1313&_sop=12&_dmpt=Vintage_Electronics_R2&_odkw=IBM+tube&_osacat=0

Remember you can always connect an external monitor to your ThinkPad until your new screen arrives if you have one. The manual should also give you instructions to change out the tube if you wish to save a few more bucks and try that route. Hope this will FIX-YA! Please leave your feedback and let me know!

SOURCE: Thinkpad screen goes blank if I touch/move laptop and reboots.

Push down on the center of your computer and restart it