I put my Lenovo laptop in my bag without shutting down and when I turned it on it couldn't boot

SOURCE: My easy note laptop will not start up!

This can happen if some newly installed hardware behaves unexpectedly or one of ur existing has developed a problem.To confirm just run system restore.Follwo the following procedure: Start->Run type "msconfig" then click on launch system restore and select a restore point.If this fixes the problem fine. Other wise download "driverscan"(search it in google)and run it.It will show you if there is any compatibility issues or problems.

SOURCE: nx 6110 boot up issue

None of the above. Sorry. All those "solutions" are "shooting in the dark". There is a definitive method of determining the problem here, without guesswork.

The "HP screen" you speak of is an "advertising mask" governed by the "quiet boot" option in BIOS.

This HP screen is shown INSTEAD of showing you exactly what BIOS is "doing" at that moment: First, a ROM checksum to verify BIOS is OK, then a quick system check of the most basic components, and if that goes well, the next thing it does is count AND check the RAM. Finally, after all that is done, it will look for a hard drive and query that drive for cylinder or LBA size, then look at MBR for sector zero, to find an operating system.

So here is what you must do to SEE all that taking place:

1. Make sure the system is TOTALLY cold (off, not in any ACPI state). Do this by pressing and holding the power button for 10 seconds, then release.

2. Remove Battery and the PSU (AC power supply)

3. Insert the PSU connector (only) this will also eliminate any battery problems. Batteries with dead cells can pull out so much current that you get slow boot/running performance. More on this later.

4. Now, start the computer, and keep pressing ESC key, quickly. It may start beeping. Stop and wait then.

5. Next, you will see a BLACK screen instead of HP screen. There will be some white text that scrolls. First the BIOS type and version. Next, RAM will be counted, and last, a HD will be reported. Last (or if any of the above have a problem) any errors will be reported. Some BIOS will specify the error, others will report it as "code XXX". Send me (post) this info, and I will analyze the problem.

NOTE: you can hit the PAUSE key at any time, to read the info, if it runs too fast for you. Then press PAUSE key again, to resume the BIOS data post process. Once you have reported back with any errors (as in step 5 above), we can also do this same thing with Windows, to "see" the black screen/errors reported as the PC boots.

SOURCE: Toshiba latop 0201 #ide problem

IDE #0 is your primary hard drive.

Toshiba's System Errors indicate that the error 0201 Failure IDE #0 may be caused by bad contact points where the drive plugs into the laptop chassis. Toshiba recommends pulling the hard drive in and out several times to clean up the male/female contact points.

Toshiba also said that if this doesn't work to contact one of their service centers for assistance.

The contact points solution rarely works, but is worth a try. Most likely, your hard drive failed and needs to be replaced.

SOURCE: Laptop HP NX9010 will not boot, Will go to bios, powers off after that.

It still sound like the hardrive,you can download a live cd of linix and try to see if it will run on linix,if so try reformatting the hardrive and reinstall windows,if you can get a copy of windows 98 and install that first 98 has a tendency to repair bad sectors of a harddrive,I have had many laptop drives not take xp untill I put 98 first.

SOURCE: Lenovo Laptop Stuck up while shut down

let it set if u turn it off by the buttons while its shutting down u'll have to format hard drive and reinstall you system