It refuses to stay on.

HP Notebook PCs - Troubleshooting LED Blink Codes or ...

h20564.www2.hp.com/hpsc/doc/public/display?...na...

Hewlett?PackardHP Notebook PCs - Troubleshooting LED Blink Codes or Beep Codes During Startup or Boot ... HP Pavilion and Compaq Presario notebook computers built in 2009 or later use blinking LEDS to identify ... Press the power button to turn on the computer, and look for blinking LED lights on the keyboard. ... Continuous blink.Missing: green ‎nc6320

HP Notebook PCs - Computer Does Not Start and Emits an ...

support.hp.com/us-en/document/c01732674

This document pertains to HP and Compaq notebook computers. .... light next to thepower socket or the light on the AC power adapter and note its condition: off, blinking, or constantly on. ... Battery power LED off, and Caps Lock/Num Lock off.Missing: green ‎nc6320

HP 6735s won't boot, power LED blinks 7 times - HP ...

I presume you have lights & sound on the controller when you turn it on - fourteen quick beeps and then a different toned fifteenth beep. The screen lights (blue). Insert the battery (lettering facing up toward the helo fuselage unitl it's seated all the way - an LED inside the fuselage, visible from behind, quick flashes and then begins a slower blinking.

Once the helo battery is inserted, turn on the controller, which starts the aforementioned beeping. On the last controller beep the helo's LED will stay lighted, indicating the helo & controller are synched.

I had a problem making sure the battery was inserted all the way into the helicopter. You'll know it's inserted properly when the LED inside the helo flashes.

Have you checked to see if your power supply is still good, or the power supply connection to the motherboard is good?

I have a problem that looks like this one.

At boot up, after the POST, each time the HDD led blinks, the laptop produces a loud "beep", and refuses to boot, as if this phenomenon prevented the HDD to be read.

If I press the power button, it stops beeping. When I release it, it starts beeping again.

If I press F8 at the beginning and then ask for a normal boot, It boots normally. Anyway, in windows, I have some strange activity, like I would continually pressing Alt+Tab. If I press Esc, it stops immediately and then all seems to work fine.

Any clue?

Automatic: The UPS performs a self-test automatically when turned on, and every

two weeks thereafter (by default). During the self-test, the UPS briefly operates the

connected equipment on battery.
Manual: Press and hold the button for a few seconds to initiate the self-test

REPLACE BATTERY LED ILLUMINATES

Replace Battery LED flashes and

short beep is emitted every two

seconds to indicate the battery is

disconnected.

Check that the battery connectors are fully engaged.

Weak battery. Allow the battery to recharge for 24 hours. Then, perform a self-test. If the

problem persists after recharging, replace the battery.

Failure of a battery self-test. The UPS emits short beeps for one minute and the Replace Battery LED

illuminates. The UPS repeats the alarm every five hours. Perform the self-test

procedure after the battery has charged for 24 hours to confirm the Replace

Battery condition. The alarm stops and the LED clears if the battery passes the
self-test.

charge it red light turning of and beeping is meaning its dead

1. remove all ext peripherals
2. remove battery
3. check first the ac adapter if it has led on (make sure ac adapter is not connected to the laptop)
4. try any other wall socket check if ac adapter will led stay on
5. if ac adapter stayed on then connect to laptop (without the batter)
6. after connecting the ac adapter to laptop check if the ac adapter led turned off, if yes then check ac adapter laptop pin on the side if is loose or damage.
7. if ac adapter stayed on after connecting to laptop press now the power button on the laptop just once. check if the power led on laptop will turn on (check if power led stays on or it blinks amber)
8. if it blinks amber then remove all CRUs such as dvd drive, memory, hard drive and wireless cards. put them back one at a time. make sure you turn off laptop when putting removed hardware. this will check and isolate which causing the power led to blink.
9. if the power led stays on then turn it off again then wait a couple of seconds then press and hold on Fn key then press power button. wait for about 5 minutes while the power led is steady on, until you hear beeps once you hear beeps it means that LCD has problems. try then connecting laptop to an external monitor if it shows display there. press on Fn + F8 to toggle the display from LCD laptop to the ext monitor. if no display replace the motherboard. if it has display replace LCD.

F7 stuck keypad
Stuck keypad may mean relay is turned on.
Determine if problem is with the Key Panel or Control by:
1. Pushing CLEAR/OFF pad.
2. Disconnecting Ribbon Cable from control and waiting at least 32 seconds to see if Code recurs

If code recurs, problem is in the control. Replace control.

If code does not recur, problem is with the Key Panel.

Operator panel display blank, five beeps, and LED off
Service tip: The printer has detected a problem with the system card, the operator panel assembly cable (part of
the top cover access assembly), or the operator panel assembly if POST does not complete. The printer emits
five beeps, and sticks in a continuous pattern until the printer is turned off.
Is this what you are getting?

Sounds like a low power problem, Check the power supply with a good ohm meter set to DC voltage if voltage is less than 14 v. Replace the supply. DWW