You may check power settings in control panel and see if somehow the
settings for your screen are set to turn off or the power settings
program has been corrupted for some reasons. Although I doubt that this
the case it is worth to check.
At the same time there is a need for more information about how did
that start or if you have done any physical changes to the computer.
Another thing you may do is connect it to an external monitor and see
if the same thing happens to the external monitor. If that is the case
then I think there is something wrong with your display card.
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The same model ThinkPad can have different types of network, video and audio drivers and unless you know exactly which one is installed in your ThinkPad, you need to download all the drivers and install each driver until you find the right driver. When you download the drivers, write down the device driver and it's file name so you have a record of which driver you are installing and which directory the unzipped files are located on your hard drive. Go to the IBM/Lenovo WEB site - support/download page and download the latest Windows device drivers for your model computer, Use this link: - http://www-307.ibm.com/pc/support/site.wss/product.do?template=%2Fproductselection%2Flandingpages%2FbrowseByProductLandingPage.vm&sitestyle=lenovo&brandind=10&validate=true You can download the various drivers and then you click on and run the various driver files, they will then unzip and expand into a sub folder on C:\drivers Then install the various drivers from this folder (run the set-up file).
As soon as anything appears on screen after power-on, press F1 (keep clicking it until the BIOS setup screen appears). The first option on the list is Date + Time, click on that, and enter correct date/time. Then press F10 to accept + reboot. If this error happens again, it means that the CMOS battery (which keeps your settings alive) has died; it is cheap + easy to replace, however you have an R40 model, and I avoid working on Rxx series so that job may be harder. I could point you to the R40 service manual, which is very good to dis-assemble that laptop (it is necessary to lift keyboard to get to CMOS battery, which involves removing some screws from the bottom.
While I was not able to find that specific model of laptop, I was able to locate the CDRW Bay and based on my research this bay only supports the following models. Though it may look the same and even have the same interface, if it is not in the supported model list, it will not properly function.
Supported Media Types:
IBM Lenovo ThinkPad R50
IBM Lenovo ThinkPad R50p
Lenovo ThinkPad R51
IBM Lenovo ThinkPad R51e
IBM Lenovo ThinkPad R52
IBM Lenovo ThinkPad T40
IBM Lenovo ThinkPad T40p
IBM Lenovo ThinkPad T41
IBM Lenovo ThinkPad T41p
IBM Lenovo ThinkPad T42
IBM Lenovo ThinkPad T42p
IBM Lenovo ThinkPad T43
IBM Lenovo ThinkPad T43p
IBM Lenovo ThinkPad T60
IBM Lenovo ThinkPad T60p
IBM Lenovo ThinkPad X40
series (X series media slice or Ultrabase required)
Lenovo ThinkPad X41 series (X series media slice or Ultrabase required)
IBM Lenovo ThinkPad T30, X30, X31, R40 series (2366, 2367,
2884, 2885, 2681, 2682, 2683, 2896, 2722, 2723, 2724, 2897, 2672, 2673 -
when installed with the optional ThinkPad Slim Drive adapter for the
UltraBay 2000 or X series UltraBase or Media Slice)
If you see your model in this list comment back and we can move forward with getting your issue resolved.
You can clear bios with factory defaults reset. For that open back cover of your laptop. Then pull cmos cell from motherbord for 10 minutes so all bios settings are defaults. Then put again cmos cell in it's position then it not ask password. Let me know if you need more assistanse. Thanks.