820-2850 missing ppbus_g3h - Badcaps

New Members (required) Introduce yourself here. Read the Forum rules here.

X

ligym60

Member

Join Date: Oct 2016

Posts: 39

Country: United States
#1

820-2850 missing ppbus_g3h

01-15-2020, 01:56 AM

Ok so I got this with quarter fan spin and it went straight to dim green light after a few minutes of diode measurements. With just the charger plugged in.
pp3v42 = 3.42
Ppbus_g3h = 0.3v
Diode mode ppbus_g3h=.489

R7020 pin1=2.4v
C7020 resistance on 1&2 =20ohms
Isl6295 (pins)27/28 20ohms
Isl6295 (pins)17/18 2.9ohms
Smc_reset_L =3.3v

Q7085 Pins 1-4=16.24v
Q7085 ppdcin_g3h_inrush =2.59v

Tried with battery g3h=12.5v at fuse f7040
Tags: None
SMDFlea

Super Moderator

Join Date: Jan 2018

Posts: 20419

Country: UK
#2

01-15-2020, 02:17 AM

Re: 820-2850 missing ppbus_g3h

With no power test R7021 and R7022 ohms, and check R7020 pin 1 and 2 ohms to gnd.

All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters
Comment
ligym60

Member

Join Date: Oct 2016

Posts: 39

Country: United States
#3

01-15-2020, 06:18 AM

Re: 820-2850 missing ppbus_g3h

R7021 pins 1 & 2 in ohms = 1.965 k ohms
R7022 pins 1 & 2 in ohms = 1.975 k ohms
R7022 between pins 1 & 2 =0.1
Comment
ligym60

Member

Join Date: Oct 2016

Posts: 39

Country: United States
#4

01-15-2020, 07:53 AM

Re: 820-2850 missing ppbus_g3h

R7022 ohms to ground I will check when I get home
Comment
ligym60

Member

Join Date: Oct 2016

Posts: 39

Country: United States
#5

01-15-2020, 04:32 PM

Re: 820-2850 missing ppbus_g3h

Resistance to ground on r7020 pin 1 15.39mohms pin 2 15.52m ohms
Comment
Gimi

Senior Member

Join Date: Aug 2015

Posts: 75

Country: UK
#6

02-02-2020, 01:44 PM

Re: 820-2850 missing ppbus_g3h

replace u7000,make sure you replace with exact same part number
Comment

Previous template Next

820-02020 PPBUS_AON missing

by ugamazing

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),...
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
02-05-2025, 04:21 PM
Apple NVIDIA AGP GeForce 6800 GT Dual Link DVI+DVI outputs 603-6338 missing caps!

by jpreza

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...

1 Photo
- Channel: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
11-01-2024, 10:54 PM
Asus Zenbook UX431DA / UM431D - Ryzen - missing PWM Fan Signal.

by gurj1979

Hey guys.

Need help with this one.
Fan not spinning due to missing PWN Fan signal.
Also 5 seconds from powering up it freezes, unless in BIOS.
But as soon as Windows starts to load, it will freeze.
CPU is COLD / Room temp when it freezes.

I've replaced the CPU, same problem.
Replaced SIO/KBC IT8987e and reprogrammed - same problem.
Replaced fan - same problem.
Replaced flex cable from board to daughterboard (which has fan connector on it) - same problem.
Checked the Thermal sensors around CPU and Board to the SIO/KBC and...
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
08-19-2024, 05:22 PM
Macbook Pro Retina 13” 820-3476-A (A1502) - missing PM_SLP_S4_L

by salopian

Hello. I would need some advice please.

My son's MBP suddenly stopped working and is now only getting the green-then-orange light on Magsafe and no fan spin.
He brought the MBP into the house (22 deg C) from a very cold conservatory (-3 deg C) and turned it on straight away. The Mac suddenly died a few minutes later.

I examined the logic board and couldn't find any signs of water damage, corrosion, blown up components etc. Nothing was ever spilt on it, and the logic board looks immaculate.

I have already replaced the logic board with another...
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
02-27-2021, 07:30 AM
sony vaio mbx-247, missing S5_ON signal

by mohamed mm

Hi everyone, I hope you are having a good day.

I have a laptop sony Vaio, DA0HK1MB6E0, MBX-247. REV: E

The laptop suddenly shut down as the owner told me, so I did the normal check there is no short but the laptop it's not powering up and there is no light when I connect the adapter because there is no battery.

so I checked.
pu9:
Vin: 19v

Ldo: 4.89v

Ref:1.99v

Vcc: 4.89v

Vdd: 4.89v

output

3.3v pcu.

EN2: 4.89v

but No...
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
01-19-2023, 05:17 AM
Loading...
No more items.

Working...