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Hi all, I have a switch lite here that had bent pins on the charge port , I replaced the port and still had some shorts...
Read moreHi , I have an asus C423NA notebook , I am trying to determine if I have a battery , charger or other issue . When I plug...
Read moreHi all , I did my first I phone 7 audio IC and C12 pad which all seemed to go well , phone boots and all functions work...
Read moreHi , I have this thermomix TM5 which trips the rcd when motor is running , I have looked for any stray wires which could...
Read moreHi all , I have been asked to look at a samsung S7 which was black screen and not charging , I had a few attempts with the...
Read moreHi , I have a blueair sense +air purifier which should operate by waving your hand over the top , I got it apart and...
Read moreHi , I have an hp pavillion x360 here that does not power up , there is a burnt component on the board but no schematics...
Read moreHi , i have this iphone 7 with half backlight issue , i replaced U3701 but it did not fix the issue , I have an O/L diode...
Read moreHi , is there more than 1 style of hdmi port for the ps4 , i have bought 2 now from 2 different suppliers and the pins...
Read moreHi all , i have an NBC250 inverter mig welder which has no spark , the fan works ok , the wire feed seems ok when i press...
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Answers
A 0.2 ohm short across these 2 points
Read moreI solved this , there was a burned resistor on the upper board , see the no voltage at the pin note in above photo,
Read moreUpdate , I guess the 10.5 vdc is correct , (it seemed low compared to other amps i have worked on) , I found a bad joint on resistor 103 and a 100 uf cap (C203) was bad too (see pics) . It is working fine again now .. https://www.dropbox.com/s/c7yzm5nup8fjwr...-12-2019%2C%209%2038%2025%20am.jpg?dl=0 https://www.dropbox.com/s/pic4y3h2dobso0...-12-2019%2C%209%2050%2006%20am.jpg?dl=0
Read moreDid you find an adhesive suitable for the home button bracket , or is super glue the answer ? , i'm having the same issue on an ipad mini 4
Read morethanks for your help , just to be certain , this is correct ? .
Read moreHi ,sorry for the delay on answering , i Finally! , found some time to spend on this board , , yes thats correct the phone booted up fine and charged . I tunes does not see it when plugged in . I put the shields back on by just touching the solder points with the iron tip , i thought maybe i pressed down a bit hard to get the solder points to line up (breaking the U1600). I had a good look around the board for dislodged components as you suggested and found R78 was dislodged so i put that back on and was kind of hopeful but still same fault , i checked the voltage on PP_BATT_VCC : These are all the components on that line , do i need to test voltage at all the components on a line to check a line ? . L4 3.8V C332 3.8V C333 3.8V C337 3.8V C3337 3.8V C335 3.8V C48_RF 3.8V C42_RF 3.8V C44_RF 3.8V C43_RF 3.8V C45_RF 3.8V C51_RF 3.8V C47_RF 3.8V C46_RF 3.8V C49_RF 3.8V C1214_RF 3.8V C100_RF 3.8V C1201_RF 3.8V C229_RF 3.8V R32_RF 3.8V C184_RF 3.8V C118_RF 3.8V C148_RF 3.8V C242_RF 3.8V C154_RF 3.8V L5 3.8V C387...
Read morethis was a fault with the logic board .
Read moreThanks for the replies guys , ive done the smc reset , also the efi and smc firmware appears to be correct versions , What kind of battery is inside the blue plastic of the PRAM battery can one be soldered in as i can only find a used one on ebay ,. I cant believe the local apple repair center class this as "vintage" and won't repair it !! . I will have a look at the LVDS connecter tonight when there are less little inquisitive fingers around !! , I have a usb microscope somewhere i will try and dig it out and have a good look . I presume its a case of changing different parts until i find the culprit ? It did have a new mainboard under the invidia chip problem , in 2011 i think it was .. thanks for your help ..
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