Re: Power Issue on HP AHL50/ABL52 LA-C701P Motherboard - UEFI Chip Not Powered
confirm if the RT8243AZQW IC PWM is supplying power to coil PL 9 & 8. If not ,check the following pins of RT8243AZQW: 2, 4, 11, 12, 13, 14, and 15. There are additional testing points on BQ24735RGRR and the SIO that need to be tested, but please update first
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Power Issue on HP AHL50/ABL52 LA-C701P Motherboard - UEFI Chip Not Powered
Hello,
I have a motherboard from an HP laptop: AHL50/ABL52 LA-C701P. Idle consumption is 35 mA; when the power button is pressed, the consumption goes up to 85 mA and stays there for about 15 seconds, then returns to 35 mA at idle.
First observation: the UEFI chip is not powered (MX25L6473E). I've checked the schematic; the +3V_PCH seems to come from two MOSFETs, 2N7002 and AO3413L. However, I don't have either +3VALW or PCH_PWR-EN present. The PCH_PWR-EN comes from the EC (KB9022QD). I've tested the +3VALW_EC on a few pins and I have 3.3V on pins 22, 32, 47, 97, 98, etc. I haven't measured all the pins, just giving an idea. What's bothersome is that this doesn't match the schematic I have: "LA-C701P rev 0.1" is indicated in the title block, and on my motherboard, it says "LA-C701P rev 1.0". I don't know if that's important... Could the EC be faulty?
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Hello
I have model AHL50/abl52 LAC710p - ac120ns. It doesn't turn on after connecting the battery. The battery is charging correctly. I remove the battery, restart the bios by pressing the start button for 30 seconds without a charger and it works. I connect the battery, press the start button and it does nothing.
When it is on and I connect the battery, I reset it and it works and detects the battery.
I have measured some voltages according to the schematic and they are correct.
Can the BIOS be corrupted?... -
Hearty greetings to everyone, trust you all are doing excellently well.
Please, I have the above problem, the laptop turned on after the switch was activated but it will turns off in less than 2 seconds.
The power stables in very rare case. Once it was stabled, everything works fine.
Once the power switched is pressed, 5V and 3V were present.
The things i have done:
1. I have check for shorts on the board, but nothing. The board is short free
2. Not a power switch problem, it behaves the same without the switch ...06-10-2024, 05:05 AM -
hi, i need bios for hp 15-ac122tu
MB Model : AHL50/ABL52 LA-C701P REV 1.0 -
hi, i need bios for hp AHL50/ABL52 LA-C701P REV 1.0...
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hi friends
i get hp laptop la-c701p
when plug adaptor the whait led change to red (orange ) for 10 sec and back to whaite againe no charging
i change pu201 (pq24735 ) no new
i test pins see proplem
VCC= 19 v ok
acok 3v ok
HIDRV = 3.3 v ??? must be 15v
spn = 3v? must be 15v
SRP = 3v?must be 15v
PHASE = 3V??
BTST 5V??? MUST BE 15V
REGN 5.90 V
LDORV =0V
BARDRV = 3.3 V
ILIM =0.46 V MUST BE 3V
SCL =3.3V
SDA = 3.3V
IOUT = 0V
ACDET = 2.65V
ACDRV = 24V
CMSRC...
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