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Well, voltage is there on Y1905 when first the power applied but just for one sec. After that nothing. I believe if it would power cycling there should be voltage on it in every 1-2 sec. Picture attached. https://c1.staticflickr.com/1/370/31399532990_90c68aaccf_o.jpg

Yes, it's steady 32kHz. I changed U1900 one more time from another donor board. Nothing changed.

Voltage on Y1905 is 1.16V for a millisecond. No oscillation. U1900 was pulled from donor board. The original U1900 did the same thing after reflow. The reason I changed it was this. I can see the waveform on Y5110 for a sec, but nothing on Y1905.

Hi, This board is liquid damaged. Corrosion around: - JTAG(I already removed it). - Backlight IC - removed - U1900 - changed - Q5480 - changed I've green and orange light. PPBUS_G3H - 12.57V PP3V3_S5 - 3.3V P5V1 - 5.1V PP3V3_SUS - 0V PM_RSMRST_L - 0V PM_SYSRST_L - 0V PPVRTC_G3H to PCH...

I rechecked R7201/2 and everything looks fine there. I've the right voltages on them. I checked CPU_VR_EN if there is any pulse on that line, but nothing at all. Checked the resistance on VR_ON again and it's open, so there is no short. I'm trying to figure out what needs to get that signal...

Yes, it does. It's 3.3V.

Hi, I received this board. It was liquid damaged I don't know where exactly, because it was cleaned before I received it. Corrosion: Around LVDS KB backlight connector J6100 - I removed it U7200 - some corrosion next to it. I cleaned the board. The board goes to S0 state, but CPU Vcore does...

I checked the resistors I changed those which looked bad, but still nothing. I can see that CPU VCORE comes up for a sec. Again, fan didn't spin. Not even just for a millisecond.

Hi, I've this liquid damaged board here. There is green and orange light on the charger. It does charge the battery. PPBUS_G3H - 8.57V SMC powers on. PP3V3_S5 presents. Before the repair the board was in S3 state. ALL_SYS_PWRGD was missing and it was 125 Ohm. I found PP1V05_S0 shorted. I...

I don't think you will be able to get the data out of the flash chips without a working controller.

I've no problem with those who are here to learn. You pay the $30 which is nothing. Simple question. Why are people here? They're here to learn and make money right? They can't pay the $30/month? But they can buy equipment to fix electronic devices? They earn money and they don't put anything...

Are you really calling me out on this? He can ban me and believe me I wouldn't give a shit about it. The fact is that I've the knowledge to fix boards and I've came here because of Duke. I'm part of other forums too and I'm happy to support something which helps me to find solutions. There are...

C1802 was pulling down PCH_SRTCRST_L. I learned something today. Thank you for your help. The board is working.

I don't think that this is a good idea. It's a paid membership forum. If anyone interested in the repair business pay the $30 as the others do. This was started as a non public forum. Not asking those people who are subscribed members about this, it's just "not fair". Those who wanted a...

Hi, I bought this from "you know where". The macbook looks like a new macbook. Not a single scratch not even at the bottom of the macbook. No liquid damage. Seller said it just stopped working one day. I'm sure I was the first person who took this macbook apart. Lot of dust in it. No liquid...

Good idea. I'll try that definitely!

I limited to 5A. My old PSU can't do more unfortunately.

I left it on the PSU almost 2 hours and still can't feel anything even with my lips. I'm clueless. I don't know what should I use there. 0.3 Ohm short.

Hi, I received this MacBook with a not turning on issue. They said it wasn't liquid damaged just one day stopped working. I'm sure it wasn't dropped, because the MacBook looks pristine. However I'm not sure if it wasn't liquid damaged. There aren't discolored pads on the board. However around...

Didn't solve it. I gave up on this board. Probably a broken trace somewhere.