My Hp pavilion 15 p249sa power light blinks only once and goes off. Nothing comes on.

KG John Justin

• 105 Answers
• Posted on Jun 22, 2008

SOURCE: blinking green light on the back of hp pavilion

1. Your smps is OK for power supply
2. check the beep sound for RAM and Video card (If it is long beep the RAM is having and short and frequent the Video card) o

3. Remove RAM then start ssytem see the response shoutdown, clean the RAM place it back start the ssytem
4. Remove the CMOS battery or short the jumber for any setting in BIOS start the ssytem
5. Disconnect all the cables connecting motherboard including Hard disk except SMPS power supply to Mother board

SOURCE: HP computer doesn't turn on

Your power supply is bad--you will need to replace. I suggest looking at tigerdiect for a replacement.

SOURCE: Flickering green light on power supply

power units not working,, the light means power problem you will need to replace the power supplie

SOURCE: hp pavilion dv5 wont start. the monitor remains

This unit should still be in warranty. If out of the first year warranty, HP has extended the warranty program for Video issues for a extra year from date of purchase.
Register your unit with HP, if not already and email customer care and log your video issue, ASAP.
I hope this has helped you.

SOURCE: HP Pavilion dv6636nr boot problem

When we talk about laptop won't boot up it is a hardware failure.

First of all, most of the hardware failures that are going to be presented in this article require you to disassemble the laptop and work on its internal components. Because of this, you need the required components to take the laptop apart (such as screwdrivers, etc.) and space, lots of space. If you don't have a workbench, then working on that large table in the living room should do it.

Second of all, you need to be extra careful about ESD (electrostatic discharge). Sure, this is important when working with a desktop system too, but you really shouldn't consider this as some sort of overreaction or waste of time. A few anti-static conductive bags should suffice. These are going to be useful when you take apart components from the laptop and you need a safe place to put them down.

If the laptop does not power on using the batteries, then try to power it using the AC adapter. Pay attention and see whether the LED on the laptop lights up, signaling that the adapter was detected. If yes, then your power jack works. If the notebook still does not power on, disassemble the laptop and remove the batteries. Look first for the CMOS battery and take it out.

Your best bet is that the problem is memory-related. What you need to do is re-seat the memory modules. If there are more than one, then try swapping them between each other and try different slots. Try booting again. If it does not work, then try running with only one module - this way, you can tell whether one is faulty.

Disassemble the laptop and remove the HDD, CD/DVD drives, and the modem and/or wireless card(s). If possible, take out the sound card module (if separate). To minimize the possible causes, you may disconnect the LCD panel as well. Try running this way. If it does boot, then try connecting each connector one at a time, booting up in between to localize the problem.

Good luck and take time to do a hard troubleshooting this trouble is not easy as well. You need to be care full in removing the some parts so that the other will not affected and being damaged.

Testimonial: "thanks! i was not waiting long enough before replacing the cmos battery back in its slot. after a ten minute wait, it did the trick. you rock."