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Sorry I don't have an oscilloscope.

Yes proper charger yes I know about the fan not spinning until cpu warms up you didn?t answer my questions in my last post?? Well? I need you super skills of deduction :)

Should there be pulses on SCL/SDA or should it be a constant voltage and if constant what voltage should I expect to see? 3.43? Also were the diode measurements I gave you a good sign or bad sign? If we put the battery aside for now why do you think I don't get fan spin with no battery and just...

SCL and SDA seem to be jumping around within the range 3.43 to 3.33 V. So I get 3.43 one second then 3.33 / 3.39 /3.34 /3.41 etc These readings are without battery. SCL 0.499 V Diode Mode SDA 0.497 V Dode Mode I'm sorry but I don't have another board. Thnx M

ISL6259 Pin 9 = .035 V Pin 15 = .067 V Resistance between pins 17/18 = 3.8 Ohms Resistance between pins 27/28 = 20.5 Ohms PPBUS_G3H = 12.56 V (Without battery) PPBUS_G3H = 13.01 V (With Battery) Don't have a good battery to try. Thnx

It?s a genuine charger. It shows the charging icon but doesn?t appear to charge - but keeps the battery at 68%. Kept it plugged in and the battery level didn?t increase nor decrease

OK so here is the current situation. Screen is working it was just a bad cable. Here is what is happening so far.... If the battery is plugged in and I plugin the charger, MacBook Powers up. If the battery is not plugged in and I plug in the charger it will NOT powerup.(even when pressing the...

Is it possible to get hold of MRI for a MacBook Pro Retina Early 2015?

Ok will try and see what happens many thanks M

Another question if I may? If the logic board is working fine and I plug in an external display but disconnect the LVDS cable should I get a picture on the external monitor? Thnx M

mmmm I see. I'll have a quick look on youtube regarding changing the LVDS cable. I hope it's not a nightmare to do! On a separate question - Why would the machine only power on when both magsafe and battery are attached?

How can I check to see if I always have backlight? It's black screen - no video no backlight as shining a torch shows nothing. Have checked the LCD connector and the plastic that separates pin1 (PPVCOUT_S0_LCDBKLT) from the back of that cable seems damaged. I'm attaching a picture of the end of...

OK so the MagSafe 2 charger arrived earlier today but I'm still getting the same problem. If I plug the battery in and the MagSafe the MacBook loads fine. Well I say fine - sometimes you hear the chime and get display and other times you only hear the chime and get NO display (I don't mean no...

Lol Yes that?s what I meant to say

I've ordered an OEM magsafe 2 adapter. Should be here soon. I'll get back to you once it arrives. thnx. M

I'm getting the Apple Logo and it's booting from my test USB in High Sierra. There was corrosion on pin 1 of the LCD cable. So just need to fit the board in fully with keyboard etc or shall I wait for the customers adapter first to see if the board will work without battery? I need to test if it...

Better still and external USB flash drive don't want to lose the guys data

I plugged in the battery and screen and the 85w charger with adapter and the fan is now spinning. Waiting a minute or two before switching off as the CPU/ Heatsink was very hot to the touch. Didn't wait for apple folder as was worried about the heat from CPU. Do they normally get really hot to...

His battery was pretty charged last time I checked when the machine was working. What if I plug in just the battery and keyboard. Should I be able to power up that way and would that prove it's more than just the charger?

I have got a brand new 45watt magsafe 2 charger here I tried but no joy so I'm guessing it would have to be 85w. I'm so sure it's not the charger but we shall see. I'm just not that lucky!