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what kind of voltage do I expect there on SMBUS_PCH_CLK and SMBUS_PCH_DATA?

Customers was using it and power it off next day didn't want to come on only beep. Can you just give me an indication where to begin with troubleshooting? At which stage should we begin with testing signals?

I need some troubleshooting method by use of the schematics Alan L. Not a try and error way. But thanks anyway for trying to help.

One beep then stop then one beep then stop continuously. I wanted to upload a video when to see that, but it is not possible as I see..44

Both of them.

Working on one imac 27. It keeps on beeping with the RAM plugged or without. VDDSPD at pin 199 of the RAM slot is present 3V3. PPDDRVTT is also present 0V75. I am wondering if I am on the right direction. Please need a quick answer!! Greeting

Like I ve said, I ve not been hier for more then 4 months. Thus, I didn t see your requestion "DO NOT USE COMMENTS". Anyway... I ve reflowed all the RAM chips but the result is the same. 3 beeps after an interval of 4 seconds, continiously.

If posting one question in 4 a 5 months while paying a monthly fee of 29$, I expect at least getting answer within a day. Other wise I will just stop this membership. Because this should be a win win situation.

PPBUS_G3H is 12V66 with both the mac adapter and the PSU using the magsafe. After unplugging the board and made some mesurements. And connected it again to a mac adapter it boots up. But it gives an error and shut down after loging to the gast account. The OS is in italian. So I couldn t...

Hello; After more then 5 months, here I am back with a niew case. I ve got a macbook that is not powering on. After check I ve found that the adapter was dead. Now I ve no replacement adapter I ve just soldered the defective macbook adapter plug to a normal laptop adapter that has 19V and 4A7...

Problem solved by changing the cable. thanks guys

Ordered one cable!

HDD 1 came with the customer laptop that gives a flashing question mark. HDD 2 is a good working hardisk borrowed from another machine. HDD 3 is totally another working harddisk At first instance I ve thought that too. If hdd1 partitionned by use of another macbook and when placed on the...

On the second test I ve changed only the HDD which is booting properly on the second machine. I don t have a spart part for the data flexcable to be tested with.

Hello; I ve got a macbook that shows a flashing question mark inside a folder after not succeeding loading the OS from the HDD. To my knowledge this can be a HDD or data cable issue! 1- I ve tried to read this HDD by use of an USB casing connected to another macbook. I could see the HDD, but...

Headphone is still not working.

Will this mean that the headphone also will work? I still didn t checked it. I thougth by removing the R6805, the headphone will be disactived! Can you explain if I m wrong? What the the role is of SPDIF

Hello Dukefawks; Thanks the problem is solved concerning the sound coming from the speaker. This was my quickest fix, :) . I understand that the Audio chip according to this change gets not anymore a signal from the audio Jack that it is plugged (while it in fact is not). Can you confirm from...

I got a macbook A1286 having no audio sound through the speakers niether through the audio socket. the device fell down while the audio jack was plugged and has damaged the board where the audio socked is located. a number of pads were cut. i ve restored those pads but without success.

I ve bought a dvi/hdmi cable conerter. Plugged it the board and connected it with a TV. I got the next picture. Check the small video.