Start up problem (again)

Question

A few weeks ago I've asked help with this question: http://forums.lenovo.com/lnv/board/message?board.id=N_Series_Lenovo_3000&message.id=5959#M5959
For time it helped, but it is the same again, but this time I do not have any devices atachet to my laptop. Now it loads only second time, no mater or it was previously shut down or hibernated.
Any suggestions?
Lenovo ThinkPad SL500 2GHz, 2GB RAM, 160GB HDD

Answer 1

Hmm... still no use - laptop loads but maybe in third time (sometimes second, sometime seventh). When restarting it is all okay, but even left on sleep mode for long time on "waking up"it turns off. Even by pressing F8 it crashes.
Other people have the same problem with a different versions of OS.
http://forums.lenovo.com/lnv/board/message?board.id=N_Series_Lenovo_3000&thread.id=6555
User yangtze has the same problem:
"This is my first posting to the Lenovo forum and regrettably it's to report the same (I think) problem.
Lenovo 3000 N200 running XP that we've only had for a few months. Type 0769 S/N L3-xxxxx 08/02.
First, it would get about 10 seconds normally into bootup, say to the Microsoft Windows XP loading screen, then abruptly power off. It would do this 1, 2, or 3 times, but then on the next try it would boot up normally. Eventually I rang technical support who suggested it might be a problem with one of the service programs and that I should try reinstalling the operating system.
Before I could get round to doing this the problem worsened. Now when I press the on button it gives me the "Windows did not start successfully" screen, then when I try to "start Windows normally" or "start with last known configuration" it does the same thing: I get the Windows XP loading screen for about 30 seconds, then I get the Lenovo/Intel white startup screen, then it loops back to the "Windows did not start successfully" screen.
For the last 3 days it has done this with battery in or out, power cable in or out, all combinations of battery and cable, I've tried the hard reset trick, etc.. I cannot boot up successfully at all now. When I press the Lenovo Care button to interrupt startup it takes me to the Rescue and Recovery 4 intro screen but then just hangs there. The only thing it will then do is power off when I hold down the power button for a few seconds, and I'm back to square one.
Reading this thread has made me very worried. Is it simply that this machine is of very poor build quality? Is it simply a software error with an easy fix? Is there a defective batch of motherboards out there? If I receive new components, how long before the problem repeats if the issue is a defective hardware batch, or defective design, and will I then be out of warranty period? How widespread is this problem, and is it just the 3000 N200 or is it a problem with many Lenovo models? Are these machines still being sold through retailers?
There seem to be many questions with few answers at the moment. I am willing to submit my machine to Lenovo engineers if this might help to find a permanent fix, but I don't want to persevere with a poor product if this or related problems will repeat due to poor build quality. 
Message last Edited by yangtze on 08-31-2008 01:26 AM
Moderator Note; s/n edited for members own protection
Message Edited by andyP on 08-31-2008 11:10 AM"
 http://forums.lenovo.com/lnv/board/message?board.id=N_Series_Lenovo_3000&thread.id=192&view=by_date_...
Smells fishy...
Message Edited by whiskyinc on 09-17-2008 09:03 PM
Message Edited by whiskyinc on 09-17-2008 09:04 PM
Lenovo ThinkPad SL500 2GHz, 2GB RAM, 160GB HDD