Laptop Model: Acer Aspire 3 A314
Motherboard Model: DA0Z8EMB8C0 - Model: Z8E
Charging IC: BQ24780 which I have repalced.

Issue Description:
I'm experiencing an issue with the charging system on this laptop. The BQ24780 charging IC is not working as expected. The main problems are:

1. ACDET is missing (0V):, Reading 0V on the ACDET pin.
2. ACOK is not present (0V): Is missing as well.
3. No SMBus signals (SDA and SCL are missing): The SDA and SCL signals for SMBus communication are not present. There is no clock (SCL) or data (SDA) activity on these lines.

What I Have...

Hello everyone, I need your help. I'm having issues with a Lenovo motherboard. When I plug in the charger, there's no current consumption. However, the laptop works if I bypass the charger IC by applying 20V directly to the main resistor. I checked the voltages at the charger IC and found that ACOK (AC OK signal) is missing, and ACDRV (AC Drive) isn't sending voltage to the gates. I've searched for shorts but found none. I replaced the charger IC three times, but ACOK remains around 0.24V–0.35V. The MOSFETs test fine. If anyone has encountered this issue, I'd appreciate your advice.​

Board had no history of liquid; unsure of drop history, but no signs of damage of any kind worth noting.

Charger sitting at 5v/0a. PPBUS is at 1.9v-0.9v steady cycle (peaks, drains, loops). Confirmed CHGR_EN_MVR is missing, but DCIN was reaching ISL just fine, so replaced ISL--no change at all. Confirmed pp3v8_aon is also missing--and being unsure *exactly* which signal appears first (or if they are simultaneous), I inspected PMU/U8100 area and found no shorts, but also found PP3V8_AON_MPMU_ISNS_VIN missing (not shorted). Replaced U8100 just in case (have had them fail in weird ways),...

Hi everyone,

I recently acquired this card from a seller who was selling a PowerMac G5 for parts. He mentioned that the video card was probably broken too.

Upon closer inspection, I can tell the reason why it won't work: it's missing a bunch of CAPS! (it's also missing an inductor - 1.0uH).

It's a nice card as it's one of the few AGP cards that will support 2560 x 1600 resolution on a PowerMac G5 using a 30" Cinema Display.

Looking at the card, it appears to be missing the following:

1x 1.0uH inductor - orange square
2x...

Hi, all
LA-L191P BQ24781 signals pin 28 -> 19V [VCC], pin 5 -> 3.3V [ACOK] pin 6 [ACDET] 2.6V, pin 24 -> 5.3V [REGN], pin 25 -> 5.3V [BTST] ,
missing +3VLP -> EC -> signals for manage BQ24781. In the power sequence the +3VLP is the first signal in AC mode.
I presume that the bios is working because one time the motherboard generate +3VLP and goes ON but after a shutdown the situation
came back to no power on -> no main 19V. The question is: who generates +3VLP which is the basis of all other signals?

Every time with the BQ24780S it's like...