after removing the kbc ic, the laptop actually shorts 3v & 5v when connected to an adapter or battery.?
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A1706 with some liquid damage. I've cleaned it but PPBUS_G3H will short to ground when its connected to the charger.
Watch a short clip of whats happening here:
https://youtu.be/HcegjB4fWVM
Is there a problem with PPBUS_G3H and what should I look for? -
I'd like to start out by thanking this forum for providing the info to be able to repair my 15 year old CP1500AVRLCD UPS. Here is all the info I gathered during my trouble-shooting and re-capping.
Like clockwork, I've had to replace the SLA batteries every 4 years. It was about that time and the UPS was acting like it needed new batteries... randomly shutting off with AC present, not being able to charge fully, and poor runtime when AC was removed. So, I replaced the batteries but noticed that it was not charging properly.
I decided to verify that the batteries were... -
Previous owner says this unit powers on and sometime has an image and sometimes not. They attempted to replace the main board but with no success.
TV came with the replacement mainboard as well as the original.
When the TV turns on there is no image or sound. No response to the remote or toggle button other than the power button. The power supply's relay was clipping here and there. It did that for several seconds even after I removed the mains. I did this even with no other boards connected (only the backlight was connected at the time). Backlight looks fine but... -
Hello!
This is my first post for help, and I am quite newer to board repair, so bear with me.
I have this board here (LA-E671P), with no power, and doesn't charge. No lights come on when plugged in.
After visual inspection of the board, U22 is obviously blown up. This is the for backlight, and there is no shorts present after removing the chip and replacing.
There is 3 USB C ports to power this board, USB 1 gives 20V, while 2 and 3 only give 5V.
My observations using USB 1 at 20V (0.075A draw on Ammeter, slowly drops from 0.136A)... -
Hello everyone,
I'm currently diagnosing a MacBook Pro A1707 motherboard that does not power on. I've gathered some data but am stuck and need expert advice.
Note that i'm a beginner in electronics and i'm trying to learn while trying to repair this macbook that my work gave me. I'm really curious and love understanding how thing works and i already learned so much.
Only one usb c port is taking 20v and have 12.5v on PPBUS_G3H. when trying other ports, 2 are not going to 20v and one is going to 20v but the CD3215 is getting really hot.
Observations...
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