Re: Acer Aspire 5 A515-51G power on but black screen
I think vcc gt doesn't turn on at these stages. It only turns on when graphic intensive program is run on the windows.
Someone correct me if I'm wrong.
Edit : Sorry. Piernov had already mentioned that....
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Re: ms-16p51 not turning on
How much amps do you see on the power supply before and after pressing the power button?...
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Re: HP Pavilion 15 -- DAY23AMB6C0 REV C, Dead
Sorry. I've remeasured and its 24K...Last edited by Jmine; 03-23-2023, 02:13 AM.
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Re: HP Pavilion 15 -- DAY23AMB6C0 REV C, Dead
Sorry. There must have been something wrong with my mutimeter. It's 3.1V.
3V_RTC is 3.01V...Last edited by Jmine; 03-23-2023, 01:53 AM.
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Re: HP Pavilion 15 -- DAY23AMB6C0 REV C, Dead
About 1Mohms...
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Re: HP Pavilion 15 -- DAY23AMB6C0 REV C, Dead
KBC_RST is also absent. I will report back once I reprogram it.
Is CH341A good programmer for a beginner? I am on an extremely tight budget here....
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Re: HP Pavilion 15 -- DAY23AMB6C0 REV C, Dead
14, 19 90 93 95 nothing!
127: 3.1v
124: 3.3V
102: 2.5V
37: 3.3v...
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Re: HP Pavilion 15 -- DAY23AMB6C0 REV C, Dead
What Should I specifically check, apart from what I've already measured?...
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Re: HP Pavilion 15 -- DAY23AMB6C0 REV C, Dead
Thank you for the valuable article...
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Re: HP Pavilion 15 -- DAY23AMB6C0 REV C, Dead
Thank you very much for the help mon2.!
Got a dumb question though. Do the 3v and 5v supplies turn on before pressing the power button on this board? Is that why they are named 3vs5 and 5vs5? I have no idea of the power sequence of this board....
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Re: HP Pavilion 15 -- DAY23AMB6C0 REV C, Dead
Pu16 pin 1 voltage to the ground: 0v
S5_on pin101 of EC: 0v
PL29 resistance to the ground: 14k...
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Re: HP Pavilion 15 -- DAY23AMB6C0 REV C, Dead
Why do I see variable voltage on pin 2 of D18( 2.9v to 3.7v)? It shouldn't be high as cpu section is not yet on?Last edited by Jmine; 03-21-2023, 03:42 AM.
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Re: HP Pavilion 15 -- DAY23AMB6C0 REV C, Dead
R555 I've got nothing on both pins...Last edited by Jmine; 03-21-2023, 03:37 AM.
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Re: HP Pavilion 15 -- DAY23AMB6C0 REV C, Dead
3.3V present @67th pin of EC...
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Re: HP Pavilion 15 -- DAY23AMB6C0 REV C, Dead
AD_ID 0.5v
+3vpcu 3.3V
It's an hp 45W charger...
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Re: HP Pavilion 15 -- DAY23AMB6C0 REV C, Dead
I measured the coils,
PL11: 130K
PL17: 8 ohms
PL21: 17ohms
PL22: 63 ohms
PL24: 87 ohms
PL25: 51K
PL26: 500 ohms
PL29: 14K
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HP Pavilion 15 -- DAY23AMB6C0 REV C, Dead
Here I am with yet another dead motherboard on my hands, seeking your help guys!
The Charging LED is on and no shorts on the board,19V and 3VPCU are present. I measured the power IC, it goes like this.
VCC: 19.7V
ACPRES: 2.9- 3.0V noticed when measuring this pin the Charging light Blinks
ACDRV: 24V
ACDET: 2.5V When measuring here, the Charging LED turns off
REGN: 6.1V
BQLODRV: 0V
BQHIGHDRV: 2.5V
BQPHASE: 2.5V
I guess these values are good, I went on to measure some voltages on EC.
VCC: 3.3v
AVCC:...
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Re: X540UBR REV 2.0, No Power
Does that mean when injecting voltage a good pch must not get warm at all?...
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X540UBR REV 2.0, No Power
The 3v/5v IC (2n5bto7) was getting hot when connected to PSU and I measured the resistance to the ground of every pin.
phase2 pin and vclk were shorted to the ground. to determine the direction of the short, I disconnected the coil which was connected to phase 2 and the short was not from the IC, but from the power rail.
I injected 1V to see what was getting warmer, about 500mA current draw was observed and The PCH side of the SoC is getting warmer.
I have 2 Questions for you guys,
Is the vlck low resistance to the ground normal?
It is safe to assume...
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Re: Commonly used SMD capacitors
Sorry I didn't specify that. Ceramic....
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