Laptop will not turn on.

I am totally stunned, but it worked!

mine hasnt worked. ffs

I had similar problem where I have to wiggle the power cord to connects to my HP laptop for it to start charging (solid blue light). I opened up my laptop (actually to replace heat sink fan ) and found that the connector is soldered on small pcb. The probem appeared that connetor cannot withstand day to day handling of power cable in and out and is going to comeoff from its connection with pcb.
Difficult part for me was to resolder the connector as I don't want to mess up other connection nearby on the PCB. I am looking for a technician who knows hp laptops can do better job.

true story: I had the exact same problem: power on, LEDs blink, 2-5 secs, turn off. sometimes the LEDs just flicker constantly especially with power cord in. left in "on" (flickering). went to this forum using another laptop. after reading the upside-down thing, decided to try it. no harm in trying. when I went back to my other laptop, it's already powered on! stupidfreaks!!!

coincidence probly, but if its the connector, let us know if anyone has done this connector fix.
acer 4520 (acer sucks)

I have a dell inspiron and have the Toshiba Satellite, he laptop lights would go on, then you hear the fan and the CD drive running for 2 seconds then it dies.. tried the above method over and over but no joy.... please help

I have a dell inspiron and have the same problem as the Toshiba Satellite, the laptop lights would go on, then you hear the fan and the CD drive running for 2 seconds then it dies.. tried the above method over and over but no joy.... please help

i have the toshiba satellite too and it wont work what did you do?

I have a DEll Vostro 1500 and it is not booting. when I start my laptop it starts and wont go to operating system it just blinks on the top left corner

For a dead HP unit your problem is different than no video issue posted initially.

But here is something you can try, and steps to verify if you should even start.

1: Make sure you see the blue ring around the DC jack light up. If this light is on- proceed.

Remove battery from back of the laptop
Remove cover under WiFi enclosure, and disconnect the CMOS battery.
Turn unit over to normal position
Hold the power button down for 30 sec. This will drain what ever settings are in the CMOS and
the cap that supply a charge to it. You can release the power button now.
Now hold the power button down again, and plug in the DC jack while continuing to hold the power button.

You should see the lights flash on briefly then go off. (This is rewriting the default settings to CMOS).
Turn the unit over, plug in the CMOS battery (& close cover). Install the main battery.

Turn the laptop on!

2: If there is no lighted ring around the power supply a front end MOSFET is out- Usually AO4407 -on the facing side of the mobo top right corner, above the power connector on DV6K, DV9K laptops.
3: If the green light on the power supply goes out -(if yours have one) when plugged in. It is usually the FDS6679 MOSFET on the top corner under black tape near the battery connector.

You can use a $5 ohmmeter set to read diodes and check MOSFETs between pins 2-3 for POS, and pins 6-7 for NEG. If the meter reads ~500 Ohms, reverse the leads and the meter should read infinity.
If the meter reads some resistance in both directions, the MOSFET is shorted.
If the meter reads no resistance in both directions, the MOSFET is open.

Note on MOSFETS: They are simple switches.
Pins 1,2,3 Source
Pin 4 GATE
Pin 5,6,7,8 Drain

When the GATE [pin 4] gets voltage, it closes the gate and power goes from Source to Drain. (on N-Channel)
When the GATE [pin 4] gets current, it closes the gate and current goes from Source to Drain. (on P-Channel)
Don't take this as a lesson, because I may have forgotten something from years ago- the other above information is known as true

Could be a short in your built-in screen. I found out my left hinge is broken, but I found that when it stopped powering up (shuts off immediately - fan and HDD come on then shut right off). I have tried the "upside down" thing to no avail. I swapped RAM in the slots. I tried to turn on with Media Center buttons and using the remote.
I think it is one of three things in MY case:

1) monitor shorting (need to try an external, and if it works then I know how to proceed. If not, then on to the next...)

2) Power Supply (checked voltage - 19.6VDC. Need to get a 4 Ohm resistor to check the current. If it doesn't read approx. 4.75A across the load, then I know the PS is bad. If it does read 4.75A, then I'm on to the next.)

3) Motherboard (if all of the above fail, then I will probably just go buy another laptop when I can afford it. Probably not an HP, although this HAS been a VERY hearty machine. Have had it for several years and it has seen it's use! It has also travelled all over the world with me and stood the test of time.)

well my hp dv9000 only lasted 1.5 years and cost 1400 dollars. I just bought a emachine at walmart for 348 dollars thats just as good as that HP junk. I also contacted the company and they could care less. There are so many websites dedicated to the lack of customer service HP offers. If you buy their products you are on your own. They do not even honor warrentees.