-
1
×InformationNeed Windows 11 help?Check documents on compatibility, FAQs, upgrade information and available fixes.
Windows 11 Support Center. -
-
1
×InformationNeed Windows 11 help?Check documents on compatibility, FAQs, upgrade information and available fixes.
Windows 11 Support Center. -
- HP Community
- Archived Topics
- Notebooks Archive
- Re: Scroll/Num Lock and Caps Lock LED's blinking and battery...

Create an account on the HP Community to personalize your profile and ask a question

01-31-2012
09:50 AM
- last edited on
01-31-2012
11:49 AM
by
SedonaF
Solution is here!
Hi fiends, i have been get into forum when i got same common problem of HP laptops. i had same problem dv4. i wasted time to find any solution of led blinking with no display according to hp diagnostic led blink code there is problem mentioned. but my question was in my mind why all peoples have same repeating problem. even pressing power button out of battery and adaptor not works. and i am so happy to here in forum because it was same dv4 which was problem
Hp have only solution to replace hardware or motherboard and its cost much if you have out of warranty.
To being Laptop technician i find out the actually problem in product and find final solution for if internal motherboard signals/communication barrier occurs, bios sends the fault codes the way led blinks.
Solution:
In Hp products have these common problem because of poor motherboard manufacturing. the laptop heat/ weather / dust effects electronics components easily and caused no display / Led blinking codes.
you need technical skills to repair motherboard. specific sections specially power supply need to be resolding specially, SMD resistors / coils etc . this task can be performed easily with the help of hot air soldering station with good quality of flux
sections which are need to be resold, i will upload video very soon.
if you need further assistant, email me at {Personal Information Removed}
02-02-2012 01:40 AM
Tip for diagnose problem:
Note down the blinking rhythm and counts with ram module installed, after without installed. if you found same count \ rhythm its mean your processor is not communication with motherboard MCU or other peripherals and post sends error codes. you may have also blinking continuously without processor installed in.
The only way you can solve this problem by locate charging control chip may be in BGA, and check the all smd resistors around the charging supply also in other section of powersupply with the reference of schematic diagram. replace the faulty smd components. it is also seems that resistors mostly restored its actually value after resolding by soldering iron or hot air soldering in the.
i do repair motherboards of all brands and noticed HP motherboards have common problem of soldering got resistive by heat effect. and can be solved by resolding.
02-28-2012 01:40 PM
Tip: apply hot air from hot air solding station passive components or around the chips. You have to select randomly areas but in 2 inches approximate so cover entire mother board and each time done work around 2 inches area, do check by only charger, ram, LCD connector or circuit part where your laptop turns on. once u capture the area of problem do proper resolding or replacent
03-16-2012 10:26 PM
04-10-2012 11:46 PM
look up bios version for your computer type. This is for the dv4
