Re: hp elitebook 840 g2 fan always running
- Measure the voltages to ground on pins 14, 15, 31, 64, 74 of KBC chip.
- Measure the voltage to ground on pin 73 of KBC chip in the following cases:
a) Power button released.
b) Power button pressed.
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Re: Acer Swift sf314-51-55 doesn't start
True.
Please, post a picture of the hot spot....
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Re: Acer Swift sf314-51-55 doesn't start
Measure the resistance to ground on any pin of marked resistor....
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Re: HP Pavillion 15-ec2253ng (DAG3HIMB8C0 REV.C)
Measure the resistances between listed pins of power connector in cases a, b, c.
- Between pin 1 and pin 10.
- Between pin 1 and pin 11.
- Between pin 1 and pin 12.
a) DC socket cable disconnected from the motherboard.
b) DC socket cable connected to the motherboard, but disconnected from the power supply.
c) DC socket cable connected to the motherboard + power supply connected, but the power supply disconnected from the wall 220V mains socket.
...
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Re: need bios dell latitude 9520
What kind of issue do you have with the old (original) BIOS and what with mine?
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Re: need bios dell latitude 9520
My BIOS dump should be compatible to this board.
Transfer the ME-region from your old (original) dump to the new one....
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Re: HP Pavillion 15-ec2253ng (DAG3HIMB8C0 REV.C)
Is there still 5V on pad 67 on the place of KBC chip (with the KBC chip removed from the board)?
How about that?...Last edited by natic; 09-10-2023, 08:31 AM.
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Re: hp elitebook 840 g2 fan always running
Which transistor exactly did you use for the replacement?
- Measure the resistance to ground on pin 4 of transistors Q7050, Q7100....
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Re: HP Omen 16 no display
Hello!
The RTC quartz oscillator (32.768kHz) is most likely the one marked in the following picture.
Yes, it's safe to run the machine without this chip.
- Measure the resistances to ground on all coils....
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Re: Asus TP412UA shorted
Yes, this transistor is a suitable replacement. You can use it....
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Re: NM-A752 no power
Put the resistor PR301 back to its place and measure the voltages to ground on all pins of battery connector with the power supply + battery connected.
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Re: hp elitebook 840 g2 fan always running
Each transistor has more than one pin. If you write "q7100 got 5v" we don't know which pin exactly do you mean. So, always specify the pin number, otherwise the measurement is pointless and says nothing to us.
Transistors Q7100, Q7050 pin count:
[url=https://postimg.cc/crv2GrS2][/url]
So, please measure the voltages to ground on pins 1, 3, 4 of transistor Q7100 when the machine is turned off.Re: hp elitebook 840 g2 fan always running
Each transistor has more than one...
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Re: HP Pavillion 15-ec2253ng (DAG3HIMB8C0 REV.C)
Does this chip still heats up?
By the way, you can test the board without this chip. It should work normally, except the USB port.
- Measure the resistance to ground on pin 67 of KBC chip.
- Measure the resistance between the central pin of the DC socket and pin 67 of KBC chip.
- True, this voltage is too high. Measure the voltage to ground on central pin of the DC socket....Last edited by natic; 09-10-2023, 04:23 AM.
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Re: need bios dell latitude 9520
It's one and the same board. The GDA55 is a short name of the board while the Compal is the name of the board manufacturer....Last edited by natic; 09-10-2023, 04:11 AM.
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Re: bios for asus g17 g712lw
Hello!
Please, upload your old (original) BIOS dump here for the analysis.
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Re: Acer Swift sf314-51-55 doesn't start
Hello!
Please, specify the motherboard marking code.
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