We have a client who has a piece of software that creates a data-driven document and sends it via a fax. Yesterday, their phone company upgraded the telephone hardware. From that point on, their server stopped sending faxes. The server connects to the outside world via a direct ISDN link from the server to the ISDN line, or via an old robotics modem that connects to ISDN via a traditional phone socket.
The problem of not being able to send a fax was caused by unplugging the ISDN cable from the server without first shutting down the server. A simple server reboot fixed the problem.
If you are faced with the situation whereby your laptop powers up but the screen does not turn on (known as the black screen of death), then there is a good chance that one of your memory modules is corrupted. Try taking each of the memory modules out in turn to see which one is corrupted. Once, you have identified the corrupted memory module, take it out and leave it out. Now your screen should switch on. Should you require the extra memory, you can buy it from somewhere like Maplin or PC World.
Another problem that can add to the black screen of death situation is a corrupted hard drive. You can purchase a data cable that is a SATA I/SATAII & IDE to USB2.0 Adapter. This allows you to take a hard drive out of a problematic laptop and format it using a number of different file formats from a different computer. Once the hard drive has be formated, you can then place the hard drive back into the laptop and insert an operating system install disk to reinstall the operating system.