HP 15-dw3019 Power-On only if battery inserted please help
Bios Programmed
kbc programmed
[MOD EDIT] Link to Schematic -> https://www.badcaps.net/forum/troubl...gpt52-la-k201p
kbc programmed
[MOD EDIT] Link to Schematic -> https://www.badcaps.net/forum/troubl...gpt52-la-k201p
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measure of main rail when attached battery/charger/both ? -
Powers on only battery power?
If adapter only is connected-what happens? Consumption on dc supply on off mode in adapter only? IS there any change in load once switch is pressed?
What happens when both adapter+battery is connected? Does it charge?
Look for AD_ID/ACDET/ACOK to begin with.Comment
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Adapter only :
ADP_ID = 3.210v
ACDET = 2.939v
VCIN1_ACOK = 2.272v
+5VALWP = 5.16V for 3sec and 0v after
+3VALWP = 3.378V for 3sec and 0v after
SPOK = 0V
Battery only :
ADP_ID = 0v
ACDET = 0v
VCIN1_ACOK = 0.4mV
+5VALWP = 2.4mV
+3VALWP = 0V
SPOK = 0V
Adapter and Battery :
ADP_ID = 3.204v
ACDET = 2.916v
VCIN1_ACOK = 3.287v
+5VALWP = 5.16V
+3VALWP = 3.378V
SPOK = 3.312VComment
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Replace the charging ic.Comment
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Is VCIN1_ACOK = 2.272v correct? Measure the voltage to ground of the +3VL rail.Adapter only :
ADP_ID = 3.210v
ACDET = 2.939v
VCIN1_ACOK = 2.272v
+5VALWP = 5.16V for 3sec and 0v after
+3VALWP = 3.378V for 3sec and 0v after
SPOK = 0V
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sorry for the delay, by mistake I touched both terminals "VCIN1_ACOK" and "ACP", now i have :
VCIN1_ACOK = 0v (Shorted to GND)
+5VALWP = 0v (Shorted to GND)
+3VALWP = 0v (Shorted to GND)
SPOK = 0v (Shorted to GND)
Adapter only :
ADP_ID = 3.210v
ACDET = 2.939v
VCIN1_ACOK = 0v (Shorted to GND)
+5VALWP = 0v (Shorted to GND)
+3VALWP = 0v (Shorted to GND)
SPOK = 0v (Shorted to GND)
Battery only :
ADP_ID = 0v
ACDET = 0v
VCIN1_ACOK = 0v (Shorted to GND)
+5VALWP = 0v (Shorted to GND)
+3VALWP = 0v (Shorted to GND)
SPOK = 0v (Shorted to GND)
Adapter and Battery :
ADP_ID = 3.204v
ACDET = 2.916v
VCIN1_ACOK = 0v (Shorted to GND)
+5VALWP = 0v (Shorted to GND)
+3VALWP = 0v (Shorted to GND)
SPOK = 0v (Shorted to GND)
"PUB1" Replaced and same voltage .Comment
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Update : +5VALWP, +3VALWP and SPOK (Shorted to GND only if the charger is plugged-in, Otherwise 0v no and no short.Comment
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The resistance must NOT be checked with power to the board. Confirm this detail. No power / no battery if measuring in resistance or DIODE mode on the meter.Shorted to GND only if the charger is plugged-inComment
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Thanks you for the reply,
No power / no battery :
The resistance in "VCIN1_ACOK" is "4.9 Ω", and in DIOD mode "0.001"
+5VALWP DIODE = 0L
+3VALWP DIODE = 0.477, RES=17.22kΩComment
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That is a dead short on VCIN1_ACOK. Remove the solder blob @ R45. Do you still have this low resistance to ground? If yes, remove PRB8. Do not lose this part. Still have a short to ground. Double check the charger IC soldering.Comment
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R45 must be isolated to determine if the EC is shorted. Is R45 a blob or a trace that can be cut temporarily?
Then test which side of the removed / cut R45 the short lies. If the EC side then the EC is defective.
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Yes, it is possible that R45 is empty but is there a PCB trace that is shorting the R45 part location? This trace must be cut so that there is no connection to EC pin # 110. Can you post a pic of this R45 location?
If this R45 location is cut and the trace is isolated, then which side of this trace is shorted? Check the resistance to ground on the side that is EC pin # 110. What is the measurement?
Repeat for the other side of R45 PCB pad. What is the measurement?Comment
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Correct. There is the wide blue solder mask covered PCB trace that is acting like a short across the R45 pads. You will need to take a sharp knife and cut this PCB pad trace. Only this area. Then the R45 trace will be isolated. One side to the EC and the other side to the rest of this circuit.
Once you do this, measure the resistance to ground again on each of these R45 pads. If the side to the EC is 4R7 then the EC is damaged. If the other side, we need to keep hunting.
Afterwards, you can apply a blob of solder to bridge these PCB pads @ R45. Or a small piece of wire or a low ohm resistor like 0 ohms; 33 ohms, etc.
See my yellow hand drawn artwork. Be careful to not scrape the tiny black resistor above this trace. Do not have any coffee before attempting this cut. If any doubts, stop and practice on a donor board before performing this surgery.
Comment
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Correct, the side to the EC is 4R7, now what the solution ?Correct. There is the wide blue solder mask covered PCB trace that is acting like a short across the R45 pads. You will need to take a sharp knife and cut this PCB pad trace. Only this area. Then the R45 trace will be isolated. One side to the EC and the other side to the rest of this circuit.
Once you do this, measure the resistance to ground again on each of these R45 pads. If the side to the EC is 4R7 then the EC is damaged. If the other side, we need to keep hunting.
Afterwards, you can apply a blob of solder to bridge these PCB pads @ R45. Or a small piece of wire or a low ohm resistor like 0 ohms; 33 ohms, etc.
See my yellow hand drawn artwork. Be careful to not scrape the tiny black resistor above this trace. Do not have any coffee before attempting this cut. If any doubts, stop and practice on a donor board before performing this surgery.
Comment
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I bought a Vostro 3400 motherboard (LA-K033P) to upgrade over my damaged Inspiron 5593 (LA-J091P) board. Everything else is ok except for the battery. This battery I am using now is already a replacement one since I disposed of the bloated original one. Back in the Inspiron 5593 motherboard, the battery charges fine and is identified just fine. However, with the upgraded motherboard, suddenly the replacement battery is labeled as "Not a dell battery". When I borrow a similar battery from my colleague (which did not have replacements yet), it is identified and charges just fine.
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The ISL88739 & ISL88739AHRZ are a highly versatile combo battery charger
configurable for operating as either a Hybrid Power Boost (HPB)
charger or a Narrow VDC (NVDC) charger, supporting 2-, 3-, or
4-cell batteries. Both configurations allow the battery to work with
the adapter together to supply the system load when it exceeds
the adapter capability, referred to as system Turbo mode. HPB
charger configuration reverse-boosts battery energy to the system
bus to help the adapter provide the system power in Turbo mode.
NVDC charger configuration...11-05-2024, 03:28 PM -
Hello guys, i need help with this problem, I have a NM-D041 mobo, it came with low impedance in 3v linear regulator rail, the cause was a damaged EC controller ITE8227e-192. I ordered a new one and replaced it. This laptop have a different chip for keyboard management and it8227e pins for programming ITE chips are not accesible through keyboard interface, I flashed it using i2c interface pins with vertyanov programmer because laptop was dead and SPI flash didn't have power (only 3v EC) so it couldn't access firmware stored in SPI memory. I read SPI and extracted it8227 firmware from original BIOS... -
Hi, so the old battery was getting error stated it's capacity is starting too get low and should be replaced, so the customer bought a new one and replaced it, but the new battery was also getting this notice that it's capacity is getting low and should be replaced, so i took the laptop for testing and the battery is charging at the terminal at 8.03V , the voltage of the battery is 7.7V, and drawing around 600mA when charger is put and the laptop is off...so that should be ok... but the bios system test doesn't recognize the battery and can't do the battery test and so is the hp battery manager,... -
I bought a case of them the battery cells are made in China the charge curve looks decent for 1 amp charging rate there is also a BMS protection board which here is the website link to them
https://batteryhookup.com/collection...-lifepo4-cells
Here are more of the same but the difference is that they do not have the BMS protection boards but have the tabbing on them
https://batteryhookup.com/collection...o4-power-cells this is...
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