hi everyone i need help on this hp dv4 2160us the problem is when i check the charger original hp charger shows 19v but when i measure on dc jack shows only 15v and there is no light and cannot turn on if charger only plugged in but when battery can turn on but shuts of 5 seconds.if charger only plugged in there is no 3v on power button but when battery plugged in there is 3v on power button but the bios chip there is no 3.3v on pin 8 both charger and battery only plugged in. there is no 3.3v and 5v on the coil when i checked the first switch mofest there is 15v and also PL1 AND PL2 have 15v i checked resistance after first switch mostef no short to ground but the resistor 000 beeping to the ground.anyone please i need help on this. the Board code: NAL70 LA-4106P REV 1.0
hp dv4 2160us cannot turn on
Collapse
X
-
Tags: None
-
Re: hp dv4 2160us cannot turn on
update: i slightly reflow pch laptop can turn on now but 5 secs shuts off and then turn again and shuts off every 5 seconds. can someone have a working bios for this model ill try to flash the bios please share -
Re: hp dv4 2160us cannot turn on
laptop now can turn on but every 5 seconds shuts off i have attached the schematic and the bios chip is MXL3205DM and its an I5 processor with no dedicated graphics can someone share a working bios pleaseComment
-
Re: hp dv4 2160us cannot turn on
If the PCH is HM55, I think it is bad. You'll have to replace it.OpenBoardView — https://github.com/OpenBoardView/OpenBoardViewComment
-
Re: hp dv4 2160us cannot turn on
yup pch is hm55 could this be bad?if there is a working bios for this model ill try first if still the same issue it could be bad pch can someone share first the working bios pleaseLast edited by String2016; 09-30-2017, 09:08 AM.Comment
-
Re: hp dv4 2160us cannot turn on
I've seen multiple reports of HM55 going bad and I experienced it myself, so I guess its reliability starts to falter after a few years.
About the BIOS, search for "LA-4106P" on this forum, you should be able to find a couple of dumps.OpenBoardView — https://github.com/OpenBoardView/OpenBoardViewComment
-
Re: hp dv4 2160us cannot turn on
thanks piernov ill try first the bios flash if its failed then hm55 dead.because problem is laptop now can turn on but every 5secs shuts off and onComment
-
Re: hp dv4 2160us cannot turn on
already tried flashed the bios with i got here in this forum still the same issue turns on 5 seconds shuts off i think PCH is bad i think you are right piernovComment
-
Re: hp dv4 2160us cannot turn on
It could be something else, like a missing power rail, try to check them all, and if one is missing, check the input voltage and the enable signal of the DC-DC controller for this power rail.OpenBoardView — https://github.com/OpenBoardView/OpenBoardViewComment
-
Re: hp dv4 2160us cannot turn on
ill forgot to tell that i only flashed the main bios chip ill try the ec flashed again i already check 19v power rail all voltages presentComment
Related Topics
Collapse
-
by popzeggeyHello, I have the similar problem. My Dell Precision 7520 doesn't turn on with only battery. Below are the various scenarios and its symptoms
1. With only battery, the laptop turns on but no display and shuts down after few seconds
2. With battery and charger plugged in, the battery light comes on. But pressing the power button does nothing and laptop refuses to turn on. However, the battery led light blinks every 17seconds from when the charger is plugged in with or without battery. So whether the battery is inserted or not, the battery led light will turn when charger...06-07-2024, 09:23 PM -
by kjchatmanthe laptop uses a 200w charger. i can trick the battery to charge by repeatedly unplugging and plugging in the charger until the voltage on the battery terminal goes high enough. The laptop will not power on while the charger is plugged in.. The only thing i see that is strange is the gate on the charging mosfets is 24 volts even though the charger is only 20 volts
-
by flat-eartherThe charging indicator light on my ASUS X54H laptop is always on even when the charger is disconnected.
Windows also shows ''Plugged in'' when charger is not connected.
This problem started year ago gradually, when unplugging the charger the charging light took several seconds to disappear, then minutes, and now almost always on even when unplugged for an entire day.
Strangely, before sometimes immediately when plugging in the charger the charging light went away, and later came back with it connected.
If I let battery run out and say it has 3% Windows will... -
by baglaivladHello everybody!
Have in work A1706 820-00239 model. Originally no power, shorted PPBUS_G3H because of corroded C6403, C6404. Some water damage around this components, but nothing major.
After replacing this capacitors the laptop came back to work, I reinstalled MacOS and had no issues until I started to test Type-C ports. Sometimes the laptop shuts off immediately when some action with Type-C ports performed (charger disconnected or USB device inserted/disconnected). I checked Type-C port flexes, they are okay, but I cleaned them anyway. I can't see any signs of liquid...11-20-2024, 08:14 AM -
by motormayhemLaptop Question
Hello,
I'm working on a Lenovo T460 that has been having trouble charging as of late. Its worked well since I've owned it for a few years. When I went to use it the other day it was dead and wouldn't turn on (was sitting on an Anker 65W GaN charger). After some fiddling with the charger I got it to turn on and start charging, but seemed like the charger was not working as it should (took a few plug and unplug cycles to get it to start charging).
A day later it was dead again and wouldn't boot/charge no matter what I did. No lights or anything when... - Loading...
- No more items.
Comment