I have a 15 - inch Retina MacBook Pro from the mid - 2014 model. Here is the link: https://www.badcaps.net/forum/showth...light=820-3662 . The battery broke some time ago. After I removed the battery and plugged in the original power adapter, the MBP could boot up normally. However, when I checked with IntelPowerGadget, I found that the CPU speed was limited to 0.8 GHz, and it ran very slowly. Later, I found a solution on GitHub. There is an open - source project called cputune that can set the CPU running speed. So I can now run the MBP at full speed. But another problem emerged. This MBP originally came with an 85W MagSafe 2 power supply. When the CPU runs at full speed and under heavy load, the MBP will power off and restart. It should be that the 85W power is not enough for the MBP, which is also why Apple limited the speed when there is no battery. But I don't want to buy another battery, even though it's very cheap in China. I want to buy a high - power adjustable voltage power supply and directly weld the positive and negative poles of the power supply to the motherboard. However, I'm not sure if the MBP can work normally after direct welding, and I haven't figured out where to make the connections. I downloaded the circuit diagram from badcaps. I want to connect the positive pole of a 20 - volt 8 - amp power supply to PP20V_DCIN_FUSE and the negative pole to GND. Can any master who repairs MBPs answer me?
-
-
This is a possible solution, yes.
You can try first with a current-adjustable voltage supply and use a very little current, let's say 200mA. If all is nice, you can raise the maximum allowed current slowly until the device is fully working. Then you know it's possible and you know the needed current.
-
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... -
I have wanting to do this project for quite sometime now and I finally found a switching power supply that will work on this desoldering gun station ZD-915 that the original switching power supply took a shit and just was not worth trying to fix it because this switching power is not quite big enough to handle the heater element and the vacuum pump
One note when I tested the switching power supply and the voltage control board I noticed that this desoldering gun heat up much faster than the original switching power supply which I was really surprised by to the point that I might buy... -
hello
i have a power supply adjustment like image
i want turn on asus vivobook with type c charger
i want a connect type c cable to power supply adjustment but type c cable have 3 wire and i don,t know how to connect the cable type c to power supply adjustment
please help me to let me know
sorry English is not my first language... -
I have been working on this concept for quite some time now with limited success but recently I found a switching power supply that is setup for the voltage that this soldering station needs to operate at however it also needs part of the secondary circuit from the original switching power because you need several voltage rails
I once tried to get a ZD-915 desoldering station to work on a 18 volt battery power supply but unfortunately things did not go well but I did find a work around but I might try this idea again but going at a little differently more about this another time... -
Hi everyone,
I'm still newbie and want to start up the shop for motherboard repairing. Need help what cable to connect from psu variable or regulator to any motherboard that we repairing? Any cable names? Since i already order the power supply regulator. From that, i can check the current and voltage go inside motherboard.
Comment