HP Laptop will not start

The computer is in the "Sleep" state. The Service Manual is available at: http://h20628.www2.hp.com/km-ext/kmcsdirect/emr_na-c03758231-1.pdf

Hello.The most common reasons for power issues are the battery, power jack and power adapter/cord.Power off and remove the battery. If the laptop powers on with just the adapter connected, your battery is faulty.If you move/wiggle the power adapter at the point where it connects to the laptop, and the power goes off and on, the power jack is the problem.The power jack is inside the laptop and either needs soldering or replacement. If a power jack problem, it should be addressed by someone knowledgeable.If no change, the power adapter is probably faulty and needs replacement.Hope this helps.

Why did you flash the bios? Did you flash it with an upgraded bios that you downloaded from the HP Compaq site for your model and your operating system? When you turn on the laptop immediately start hitting the F8 Key repeatedly to see if it shows you the SAFE Mode option. If so select Safe Mode and see if it boots.

Are there any blinking lights or beeps? This is very strange. Try removing the battery and the power cord, then press and hold the power button for 30 seconds. After 30 seconds plug the power cord back in (leave the battery out) and see if it boots. If it does you had a static buildup in the laptop and you released it by holding the power button for 30 seconds. If it boots, put the battery back in.

if all fails you can try to see if your system will go into System Recovery when you press the Power Button immediately hit the F10 or F11 keys repeatedly. If so you can set your system back to the way it was when your purchased it. That means you will lose all your data, documents, music, pictures and videos.

In order to decide whether it is the AC adapter or the power input, please refer to the following article:
http://www.fixya.com/support/r6395191-troubleshooting_laptop_power_failures_ac

This article explains in detail how to diagnose the AC adapter issues.

Since it sounds like an issue with the Power first try to release flea power.Disconnect the charger,remove battery,press and hold down the power button for 30 seconds.Reconnect the battery and charger.Turn on system and check if it turns on. For further help please check Dell Inspiron 1525 Manual. Also confirm if the light on the charger stays on,when connected to the system.

Check the power cord at the connector. Hp has a problem with the cords breaking internally. I had a problem with mine and found that if I played with the cord then it worked for a while. I ended up buying a new power supply.

Please check it another display i mean a monitor.When its come other monitor may be fault your laptop TFT.Or it not OK may be fault laptop motherboard.Repair it by a good technician,who live in your area.

The battery has an internal failure. While it may still run the system, the only way to stop the LED indication is to replace the battery.

That a nice computer you have there. Based on your description, my guess is you have a bad power supply.
About a $300 fix if you send back to HP. Which is what I had to do a while back.

try taking the battery out, make sure the ac adaptor is not connected, hold down the power button for 60 secs and then put the battery back in and try turning it on.