Works good when rv plugged in to AC LP or AC but even if runnin in LP and I remove the power cord shuts down and red x is on , wont try to start up.

Unplug, remove battery, check for dust in fans and vents, plug in, try to reboot. If it powers up, open Control Panel, Power Options Power , set to High Performance, open Advanced Power settings, set Sleep and Hibernate to Never, Adjust other Advanced settings to your preference. Has it been pulled by the cord? If you have a multimeter check for DC volts at the AC jack plug, that plugs into the laptop. Is the Transformer (brick on the cord) getting warm when plug in? Does the battery charge LED light? Try another cord with the EXACT same power specs.

Try booting under AC power with the battery removed.

Your not getting power? When you plug the laptop in does the Battery charge light come on? Are you getting power to the laptop? Do you have a multimeter to verify voltage from th AC outlet to the AC jack? Or ,the power gets to the laptop and push the on/off button you get no response? Or, you push the on/off button and the laptop starts then shut down? No lights, no leds blink. Remove battery, Try another cord/charger. Has it been dropped or damaged that would jar loose a connection, or pulled by the cord resulting in a damaged AC jack?

Remove the battery and AC Adapter cord, and press and hold the power button for 30 seconds. Then, without replacing the battery try plugging in your AC Adapter to see if you get any love. If that doesn't work, remove the AC adapter, reset the board again, and this time hold the power button down as you plug in the AC Adapter cord. If you still don't get any lights, you could try removing your memory, reset the board, replace the memory, plug in the AC Adapter, and try one more time.

If all of this fails...you should take advice from experts,call at-http://www.vtechsquad.com

First try using a different ac adapter/power cord.If after trying that it won't power up it only leaves the power board where the power button is located may be bad or the power jack where the ac adapter/power cord plugs into the laptop may be bad.Alot of the time when the ac adapter/power cord gets weak or stops working at all will cause it to not charge or not turn on even plugged in.

If your plugged in to a 15 amp household receptacle, then an extension cable of any kind or length, then that is likely your problem. An AC unit should have 20 amps of good power available to it. If your using an extension cord of any kind, and it is any less than 12 gauge wire, then that will cause a drop in voltage as well. Obviously the best scenario would be to install and wire a 30 amp receptacle outside your house just for that use, if done often. Take a voltage reading at receptacle, then inside RV, and see how it is probably a little less without even the AC on, then when AC kicks in, or tries to.
It may work once in a while, but it's not good for the AC to try and operate on low voltage, which causes a higher amperage draw.

To start with, if it's plugged in to a 15 amp breaker, and extension cord, the compressor starting up may just be enough to trip the breaker. It will draw close to 15 amps on start-up of compressor, and if there is a light extension cord used to plug it in, that only makes it worse. Make sure you shut all other breakers off in panel except AC, and try it. If you have water heater on hydro, fridge on hydro, and then try to start AC compressor, you'll be way over the 15 amps, especially if it's a light extension cord.
Keep in mind, in order for fridge to work, you need 12 volts DC (Battery) power going to back of fridge. If the controls aren't lighting up at top, you've most likely got no 12 Volt DC power going to fridge. Check all fuses as well.

I want to try a very simple thing, cause it happened to me, while I am working on my computer , it shut down unexpectedly... cause the processor is working with its full performance and no enough cooling around the laptop. so while I move to other place and also I raise the laptop a little bit from the back to let the fans (bottom of the laptop) works perfectly .
try to open it again and do so.... may be it is a so simple thing that was far from your mind like I was before... good luck

Here are the solutions ive gathered for this problem:

================

IBM has finally given me a fix for the T21 I am working on for a

customer. I asked them "What if it doesn't work, then what. Their

response was "GAURENTEED to work". Here it is:

1.) Unplug the power cord and the battery.
2.) Press the 'Power' Button 10 times repeatedly.
3.) Then hold the 'Power' Button down for 25 seconds.
4.) Put the battery back in and plug the power cord back in.
5.) Should power up right away.

This did work THIS time on the machine I have in front of me. I hope

this works for all of you. If you have any other questions, please

feel free to email me and ask any questions

Oh and just one more thing to help you out.

This problem is caused by an overcharged capacitor (supposedly) and

the error ONLY occurs IF you leave the laptop plugged in too long with

the battery in. If you ONLY plug it in when you are using it, then it

should not overcharge. And actually I would suggest that you unplug it

about 20 min or so before you are done using the system.

=====================

I have been a IBM Thinkpad T20 user for last 3+ years and I think it

is an very sturdy system that it's been working non-stop for such a

long time with not a single problem even after so much of abuse it

went thru in my baby's hands......until last week when it just wont

boot up. Then I found this post online....I tried the refrigerator

option also to no avail. Finally I just removed the battery and AC and

let the system sit for a 2 days in a cool place near window. Third day

I plugged in battery, plugged in the AC, and voila, it comes up fine.

Right now I am backing up all my files and I'll keep you posted if it

experiences a boot problem again. If I don't post again, assume it's

all working good again !!

Bottom line is that it could be the overcharged capacitor in my case

and letting it sit alone discharged it completely.

Good luck to you!

==================

I have the same problem, and i fix it. Well no fix but now in few

seconds i can start notepad when i want to. My battery dead. Without

the battery, you can start if you hold down the power botton while you

get in/get out quickly the ac connector several times .Try it!!!!

I think the intelligent battery or same cheap condensator in the power

module is the problem (so when you connect the ac power connector you

can hear the charge of it).

you can restart without problem but if you switch off you will need to

repeat the process to start the notepad.

====================

I have a T22 that won't power on. After removing the AC power cord, I had to repeatedly (as fast as you can press it) press the power button until it powers on. I was not able to do a normal shut down, it would just hang. So with the battery removed and the AC plugged in pull the AC power cord.(Try to do it when the hard drive light is out!)I have cycled thru several power ups with no problems after doing this.
Hope this might help somebody else.
I would love to know which capacitor is being affected on the motherboard. this way you could install a momentary switch with resistor to ground to drain the capacitor.

===============

Thanx to all the authors of these solutions