Macbook Pro A2338 no power. This chip is short and goes extremely hot. When removed the short is gone. Can someone help me out what chip is this?
-
Macbook Pro A2338 no power. This chip is short and goes extremely hot. When removed the short is gone. Can someone help me out what chip is this? -
What is the reference to this part in your bv file?
It is UT610 from my bv file.
Part # NCP160AMX300
ONSEMI is the vendor.
https://www.arrow.com/en/products/ncp160amx300tbg/on-semiconductor?utm_source=google&utm_medium=cpc&utm_campaign=brand_g-ppc-us-sku-english-all-na-power_management-main-v4_q1_2025&utm_content=na_en&gad_source=1&gclid=CjwKCAiAzvC9BhADEiwAEhtlN0LnQmK529Bf_AfILPWl1al-ubULzNoKZ7ZuinllxJhYaWo5gQNaBhoCnPwQAvD_BwE&gclsrc=aw.ds
https://www.aliexpress.com/w/wholesale-NCP160AMX300TBG.html?spm=a2g0o.home.search.0
There are a few other vendors that are building in this package including Texas Instruments.
Before you replace the part, test the resistance to ground on the output rail of this device. If this part is getting hot, it may be because the rail is shorted or exceeding the specification of this low current LDO regulator.Last edited by mon2; 02-24-2025, 07:09 AM. -
Thank you so much sir. very big help. regards!Comment
-
I am looking at an A2337 and found this for the order of power rails and what they do. Can this be confirmed before I dive into hunting down power rails that do not exist or are not neccisary?
- PPBUS_G3H (12.6V-12.8V)
- This is the main power rail that supplies power to the entire system. Check this rail first, as it must be present for other power rails to work.
- PP3V42_G3H (3.42V)
- This power rail is derived from PPBUS_G3H and is used to power the SMC (System Management Controller) and other essential circuits. It should be present if PPBUS_G3H is working correctly.
- PPVRTC_G3H (3.3V)
- This
- PPBUS_G3H (12.6V-12.8V)
-
Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
Assuming... -
Hello everyone,
I'm trying to repair my old Acer Nitro 5 (AN517-54-55T5). I've already bought a new laptop, so this is more of a learning project. For the experience, with no high expectations of success.
Well, my decice specs are the following:
Model: Acer Nitro 5 AN517-54-55T5
CPU: Intel Core i5-11400H
GPU: NVIDIA GeForce GTX 1650
Motherboard: GH51G LA-L181P Rev:1c
The symptom:
When pressing the power button, the power LED lights up for about 5 seconds and then turns off. Initially, the issue was intermittent: sometimes...05-26-2025, 10:49 AM -
Hi all
i have a 2338 which had no display (there is a little crack near the edge to the case) but worked with external display. Some weeks later it didn`t boot anymore.
USB Tester shows 5,18v, 0,08 a and 0,38w with power supply.
With battery connected i get 20v and 0,0 a
Thermal camera shows that U0500 is heating up to 30c.
F5200 is not shorted
Visual inspection didn't show any problems.
I'm sure that i need to change the display but what can i do to find my other problem with the board?... -
Good afternoon everyone.
I've got M1 machine with some liquid spillage around QP700 (screen connector) and CF601 (charger connector)
after cleaning with some alcohol everything was working fine until yesterday.
Macbook won't power, only 5v.
I've decided to open and check again, RP700 was a bit corroded so I've replaced it from a donor board
Still no luck.
After checking if any parts were getting hot, I found that RN420, RN421, RN422, and RN423 were getting hot.
What does this mean?
A few measurements...10-20-2024, 10:22 AM
Comment