I have an H/P laptop that won't start up. Is there a book on taking laptops apart?

take the new battery out
see if it will kick start just on mains power

if you hear a beep as it powers up mother board is ok
if the mother board is dead and no beeps it wont start up

try this each time from power up
if you hear a beep hold down
one of these F5 of F1 or F 12 wait to
see if a menu from the mother board itself is visabe
then follow the prompts

if nothing also suspect hard drive or chip failure

Sorry, but he's probably correct. You need to replace the whole motherboard.

You will never be able to find the chip to replace, let alone find someone qualified to correctly remove the bad chip and then replace it with a good one.

take it back and use the warranty or contact the manufacturer if you've been there 6 times then the seller should replace it.

If you need further help, reach me via phone at https://www.6ya.com/expert/joel_63c670a84e9f6a97

Before you buy a new mother board, (the L300D-13S board is around $185 from China), remove your battery, leave it for about 5 minutes. Use only the Mains power supply and see if it will switch on.
Fit the battery, plug in the Mains Charger and see if the battery charge light comes on. If it does and it won't give you a screen or flash the hard drive light or power up the hard drive, then I am inclined to go along with a replacement Mother Board.
The laptop has to complete the POST and if it doesn't that usually points to Mother Board problems.
Were you trying to upload a newer version of the BIOS before it failed?
Good luck but check ebay and beware there are some really dodgy frauds out there.

Start taking your laptop apart piece by piece and test it after each removed component:
1. Remove the hard drive and test the laptop.
2. Remove the DVD drive and test the laptop.
3. Remove the wireless card and test the laptop.
4. Unplug the display panel from the motherboard/video card and test the laptop.
etc....
Continue taking it apart until you have only three major components connected: motherboard (with video card), processor, and memory. If you still experience the same problem, most likely it's bad motherboard.
By the way, before you start, try reconnecting the memory module. If you have two modules installed, try removing them one by one and test the laptop with each one separately

Start taking your laptop apart piece by piece and test it after each removed component:
1. Remove the hard drive and test the laptop.
2. Remove the DVD drive and test the laptop.
3. Remove the wireless card and test the laptop.
4. Unplug the display panel from the motherboard/video card and test the laptop.
etc....
Continue taking it apart until you have only three major components connected: motherboard (with video card), processor, and memory. If you still experience the same problem, most likely it's bad motherboard.
By the way, before you start, try reconnecting the memory module. If you have two modules installed, try removing them one by one and test the laptop with each one separately.

could be power related.. even a new one can fall victim of power..

Kinda strange. Not turning on indicates a hardware problem, you made software changes. If the software changes caused a problem, it would start, just not boot to windows. I would first tryy to reset the laptop. Unplug it and remove the battery, hold down the power button for 60 seconds, then try again. If still no go, start removing hardware one at a time, hard drive, rem, wireless card, dvd rom. You may have a bad hard drive. Your pc should boot to bios if there is no hard drive installed. If that happens, run a diagnostic on your hard drive from your bios. Let me know if you need anything else.
seth

why not use the laptop u have as a replacement for ur motherboard.....would be much easier as to stuff around......the ball is in ur corner,,,,and good luck

can you take it apart?