My lenovo n200 does on turn on it beeps and screen remains blank

First, Look for a "popped capacitor", the top of the cap should be flat, IF it is rounded then it is "popped", that needs replacing.

Next, Have you also tried several other AC adapters?

Last, How many hours have to got "into" fixing this? More than a day? More than two days? More than a month? IF more than a month, keep the hard drive, CD/DVD Rom, CPU, memory, screen and wifi card (if any) and toss the rest. Then purchase a new/er laptop along with a USB adapter cord to connect your old laptop hard drive... so you can pull your old info onto the new computer...
Then, sell the other parts on ebay/(wherever)...

Hope this helps...

Happy New Year!

Topbarhive

First, I would open the memory door, and re-seat memory.
Next I would open the hard drive door and try to re-seat that also.
Then try again.

Hope this helps...

Topbarhive

just go to www.google.com and write in here what do you want.

First you try with removing the ram and clean it and insert it again also if you have tft monitor just connect the vga cable and see are you getting the display on tft screen.
Hope this helps. Please rate my response.
Thanks.
Have a good day.

I have a Lenovo 0769 and my motherboard is dead, it worked for 2 years and 3 month. Now it is out of warrenty and new motherboard costs almost the same as a new laptop..

Most likly i had a problem with my laptop and motherboard was blown excatly like your prob

Cheers
Man of wisdom

try getting the driver from a website called softpedia or rapidshare

Go to the IBM/Lenovo WEB site - support/download page and download the latest Windows XP audio driver for your model laptop,
www-307.ibm.com/pc/support/site.wss/MIGR-39956.html

Enter Here for all your drivers for lenovo 3000 n200! Rate me for this! Thanks!

you have to install the mainanance partition bzw. restore the system from the recover cds this will install.
System utilities N200 (type 0769) Hotkey utility Windows Vista, XP, 2000 * 24 Nov 2008
v2.09.0002 Lenovo System Interface Driver Windows Vista, XP 01 Sep 2008
v1.01.0805
http://www-307.ibm.com/pc/support/site.wss/document.do?sitestyle=lenovo&lndocid=MIGR-67855