psdavid65
Member
Last Activity: 09-05-2024, 03:12 AM
Joined: 12-23-2021
Location: Accra
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Thanks for the feedback. Bless You... -
Novuton EC assistance.
Hi Guys. Quick question.
Is the nuvoton npcx797ha1bx controller programmable or it self programs itself upon fixing it on the board. I'm asking for HP 830 G6 motherboard. -
Got this to work by serializing the bios. Everything works well now...Leave a comment:
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Macbook Air A1466 820-3437-B Booting Problem
I received a 2013 Macbook Air A1466 820-3437-B motherboard with serial number C02L6GQ9FSV8 that came in WITHOUT a bios chip. I got a new bios chip and reprogrammed it. Macbook now powers on but doesn't boot the SSD. I've flashed a ton of bios but still same problem. Windows installation works with this Macbook but never a mac installation. Unfortunately, since I didn't receive this macbook with a bios chip, I don't have the original bios. What can I do now?... -
The serial number is C02L6GQ9FSV8...Leave a comment:
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A1466 820-3437-B Bios Problem
I received a 2013 Macbook Air A1466 A1466 820-3437-B motherboard WITHOUT a bios chip. I got a new bios chip and reprogrammed it. Macbook now powers on but doesn't boot the SSD. I've flashed a ton of bios but still same problem. Windows installation works with this Macbook but never a mac installation. Unfortunately, since I didn't receive this macbook with a bios chip, I don't have the original bios. What can I do now? -
Thanks once again for the privilege of becoming part of this body of knowledge.Leave a comment:
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What makes a person a new member seeing that I joined badcaps in 2021. How many years must one be active to become an old member? -
Apple A1425 No Power 820-3462
Hi there. Quick question. What is the resistor value for R6920. I'm measuring 43.6K and the 19v is not flowing through it from PPDCIN_G3H_ISOL to the otherside of PP18V5_DCIN_CONN_R.
Is this resistor broken? -
Re: Toshiba 40L1333DEV Vestel 17IPS20
Thank you Iotas. I'm grateful for your assistanceLeave a comment:
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Re: Toshiba 40L1333DEV Vestel 17IPS20
Thank you for your reply.
The diode and mosfet connected to pin 5 of U202 is functioning normally.
I do realize that when I lift the leg pin 5 of this U202 IC from the board, the short disappears. When I check the lifted pin(Not connected to board at this time), the short is on the IC itself. I however do not have a replacement ICLeave a comment:
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Toshiba 40L1333DEV Vestel 17IPS20
Quick Question Please.
Is low resistance on gate pin 5 of U202 normal? I have a very very low resistance of 5 ohm on this gate. In diode mode, it looks shorted and beeps. Is this a normal behavior of this FAN6300 IC?
All other components on this vestel board have valid readings except for this U202 IC. -
Re: Charging IC BQ24736 ILIM Question
Thank you for your advice Mon2. I'm really glad you took time off your busy schedule to assist me. Bless youLeave a comment:
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Re: Charging IC BQ24736 ILIM Question
Hi Mon2. Thank you so much for the quick reply.
The charging IC is BQ24736 but I think its the same as BQ24726
Quick update, after getting another battery from a similar model, the battery began to charge.Leave a comment:
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Re: Charging IC BQ24736 ILIM Question
The closest schematic to this is HP 4340S and they use the same power scheme and same BQ24726 ICLeave a comment:
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Re: Charging IC BQ24736 ILIM Question
The logic board is an HP 1040 G2 which doesn't charge. Battery is always at 0%. Unfortunately this model doesn't have a schematic but this is what I have found so far.
Switching is perfect on blocking and switching mosfets. 1st P channel mosfet has 6volts on gate and second N channel mosfet has 25 volts on gate.
ACP, ACN, CMSRC are both 19volts.
ACDRV has 25 volts
ACOK has 3.3V
ACDET has 2.6V
REGN has 6V
BTST has 5.93volts
SCL 3.15V
SDA 3.3V
ILIM 3.3V
DLIM 0V
IOUT 0V...Leave a comment:
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Charging IC BQ24736 ILIM Question
Hi there. Could someone kindly assist me with how much voltage in needed on Pin number 10(ILIM) and Pin 11(DLIM) for standard operation of the laptop. I have 3.3V on ILIM and 0 Volts on DLIM. Are these voltages normal? what will happen is ILIM is 0 volts? What will happen if DLIM is 3.3V
IC is BQ24736 -
Re: Lenovo BYG40 NM A411 No power
Thank you for the speedy reply. I'm grateful.Leave a comment:
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Lenovo BYG40 NM A411 No power
Quick question please.
Does anyone have an idea what voltage is supposed to be on VUSB, and PD7, VUSB_OPEN and drain of PQ12.
The schematic for the motherboard is BYG40 NM A411 -
Re: New Members - please post your introductions here
Lots of knowledge to assimilate here. Glad I joinedLeave a comment:
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