Flashing LEDs No Boot Presario CQ40

[Roaming_Tech]

I have a Compaq Presario CQ40-107AU that will not boot. After pressing the power button, the fan starts running and nothing happens for several seconds. After approximately 20 seconds the LEDs above Scroll Lock and next to Caps Lock blink continously.

I found explinations of the blink codes somewhere online and found that the code was supposed to mean low power from the power adapter. I purchased a new (non-OEM) adapter and have the same issue. I tried a hard reset (removed the battery, disconnected power adapter and held the power button) doing this did not resolve the issue.

I am going to pop the case open tonight and verify all connections and visually inspect the solder and board where the power adapter mates to the notebook and was wondering if anyone has any suggestions for me. I am unable to find this paticular model listed in any of the support areas on HP's support site.

[Mumbodog]

See this document

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

[Roaming_Tech]

Thanks for the link. Realized I read it wrong earlier. However, unless the blink code repeats continously, that doccument does not resolve my issue. If the blink code does continously repeat, then I guess the unit has a faulty CPU.

Again, going to open the case and check all internal connections once I get home.

[yipin]

Hi, i just experience the same symptom (CQ40).  I tried to solve by myself by following the document, but it doesn't mention about continuous blinking at CapsLock & Num Lock.  I also check my output adapter voltage, no wrong about it (18.5V).  Memory card and hardisk drive also fit properly.  Then, i tried to reset my bios by take out the bios battery, still not help.  The pcb condition include pattern and components by visual check all ok, no sign of burn.  Is there any meaning for continuous blinking at CapsLock & NumLock?  Please help me... Thank you.

[pangeran]

i have a same problem too... my brother's CQ40 won't boot, continous blinking numlock  and capslock and no matching with table's error in http://support.hp.com/us-en/document/c01732674

help!!!

[matrixcs]

well its a cpu error i got the same issue now... im buying an AMD Turion RM-72 processor see if it works...

[techsolution]

I have compaq cq 40 laptop that will not gives display.after pressing power button the fan starts running and nothing happens for several seconds. After approx 20 sec. the LEDs above scroll lock and caps lock blink continously.

[techsolution]

solve my problem

[alfons]

how you solved your problem? i had same problem too. thanks

[Syutpogi]

Remove hard drive and memory and do the hard reset.