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[SOLVED]820-2936 question
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INA213 in an SC70 package is an INA213 in an SC70 package regardless of what it is used for.
thank you masterok masters I did replace the part I did replace some water damage components now machine turn on fan spins I hear the chime but... there is no display I do the lamp test and Im unable to see the question mark folder , what should be my first steps to troubleshoot this problem?
hello Master Duke thank you for your help , well here is the thing machine not boot all the time on the pc crap booteable disk , is just do it randomly some times, I just see the display and light working like on 3 attemps out of 10 , over all it shows no display or light, if I try a hard drive with OS X already I get nothing , just black screen and no display microscope lamp on the back of the apple on each try.
I have a question on : PPVOUT_SW_LCDBKLT whats the voltage that should be present with no lcd plug on the board?
also C9020 and C9796 look pretty bad they still show continuity with the lcd conector booth of them , but look bad , I was thinking first that since machine show light and display with the crap pc booteable disk leave that alone but now im thinking that maybe I should replace them whats your opinion on that?
another anomaly : I clean some corrosion on L9080 , I don't know what voltage should be present in there , I never did a machine with no display with a present chime , I barely look for the first time ever to J9000 on the schematic today , so I have a lot of questions.
The next voltages should be present without lcd plug to the machine? or they need the lcd to be plug to test ?:
PP3V3_LCDVDD_SW
PP3V3_S0 (this one should be there if the fan is spinning right?)
LVDS_DDC_CLK
LVDS_DDC_DATA
LVDS_IG_A_CLK_N
LVDS_IG_A_CLK_P
and also they all should be present?
and what I did so far and that didn't fix the machine was replace U5400 also paths to R5400 now have wires because corrosion destroy the old paths , I replace also Q5300 and trace wires to R5301 and R5303 from Q5300 because bad paths, r5301 was replace too.
I ultrasonic the board
And I almost forget , pins on the lcd conector on the board of PPVOUT_SW_LCDBKLT look like burn but paths to capacitors there are still good.
That's all the info I have.
Another Question SMC_LID what that controls? and what should be my next step to find out if the issue is related to that?
Leave the BIL disconnected and try again what BIL stands for?
I have a question on : PPVOUT_SW_LCDBKLT whats the voltage that should be present with no lcd plug on the board?
also C9020 and C9796 look pretty bad they still show continuity with the lcd conector booth of them , but look bad , I was thinking first that since machine show light and display with the crap pc booteable disk leave that alone but now im thinking that maybe I should replace them whats your opinion on that?
another anomaly : I clean some corrosion on L9080 , I don't know what voltage should be present in there , I never did a machine with no display with a present chime , I barely look for the first time ever to J9000 on the schematic today , so I have a lot of questions.
The next voltages should be present without lcd plug to the machine? or they need the lcd to be plug to test ?:
PP3V3_LCDVDD_SW
PP3V3_S0 (this one should be there if the fan is spinning right?)
LVDS_DDC_CLK
LVDS_DDC_DATA
LVDS_IG_A_CLK_N
LVDS_IG_A_CLK_P
and also they all should be present?
and what I did so far and that didn't fix the machine was replace U5400 also paths to R5400 now have wires because corrosion destroy the old paths , I replace also Q5300 and trace wires to R5301 and R5303 from Q5300 because bad paths, r5301 was replace too.
I ultrasonic the board
And I almost forget , pins on the lcd conector on the board of PPVOUT_SW_LCDBKLT look like burn but paths to capacitors there are still good.
That's all the info I have.
Another Question SMC_LID what that controls? and what should be my next step to find out if the issue is related to that?
Leave the BIL disconnected and try again what BIL stands for?
Ok im going to update my findings , I when and check Q9706 and on pins 3 and 4 I have 12.6v , what this mean that voltage divider is not working? for LCDBKLT_EN_DIV what voltage I suppose to have? R9788 and r9789 match schematic and c9782 has no continuity on its pins , PPBUS_SW_LCDBKLT_PWR have no power.
Well I think I just start to destroy and sodomize the board , I remove Q9706 and run a wire from pin 4 to PPBUS_SW_LCDBKLT_PWR to check if that will give me the backlight back , but when I power the machine I see light coming from the lcd for less that 1 second all gets white and then go back to be all dark and light don't come back and does the same each time I power on.
The LCD is not recognized! Doing some stupid shit is NOT going to magically fix this.
PP3V3_S0, DDC_CLK and DDC_DATA are involved in this. Seeing that you said there was corrosion on the LCD connector it is probably fucked.
If diode mode on all these 3 signals show something the it is probably the connector/cable
PP3V3_S0, DDC_CLK and DDC_DATA are involved in this. Seeing that you said there was corrosion on the LCD connector it is probably fucked.
If diode mode on all these 3 signals show something the it is probably the connector/cable
thank you duke tomorrow I will try it ,i was trying to guess what was going to be your answer , I was betting you was going to said to replace the connector , but I miss , I never imagine that I could test the connector like that , now I can check like that anytime im not sure about it on any board , awesome.
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