Need your help.... I am working on a MacBook Pro logic board 820-2914-B. The initial problem was broad vertical all over the LCD screen. As per its known problem of these logic board models, the Video chip AMD 216-0810005 gets faulty., & in several case of mine a BGA reflow with new flux worked fine & the display turned to normal. In this case its not the same., I checked all the voltages as per the circuit diagram & in the end I had to replaced the BGA Video Chip AMD 216-0810005. I soldered the new chip on the board, still same. I took a known good chip, re-balled & soldered it on the logic board, still the same, no difference, the back light is bright & fine, & I see the blinking folder after a while. I read some forums & they say to replace the video ram chip (Set of 4) after checking all voltages are good. Then ordered brand new ram chip (x4) & installed them, no difference in video, still broad red vertical line. Did anyone come across like this problem? Now both the video chip & rams installed on the logic board are new & known good working. Kindly help & any tips towards this repair will be greatly appreciated. , am I doing something wrong???
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Re: MacBook Pro 17" A1297 broad red Vertical Lines
Wrong VRAM strapping resistor settings?OpenBoardView — https://github.com/OpenBoardView/OpenBoardView -
Re: MacBook Pro 17" A1297 broad red Vertical Lines
Thanks., so in this case what is my next step, what should I do????Comment
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Re: MacBook Pro 17" A1297 broad red Vertical Lines
Put the correct combination of GPU/VRAM/strapping resistor. If the GPU and the VRAM are the exact same model as original, no one messed with it before and no strapping resistors were knocked off that's not the issue though so try replacing GMUX.OpenBoardView — https://github.com/OpenBoardView/OpenBoardViewComment
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Re: MacBook Pro 17" A1297 broad red Vertical Lines
Piernov., you are so helpful... Piernov do you know the correct combination of GPU/VRAM/strapping resistor?? as in your experience you must have come across these combinations a lot. I would appreciate if you provide me with the given combination IGPU/VRAM/strapping resistor series #s to make my life more easier, rather than searching online. I really appreciate all your help. Thank you.Comment
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Re: MacBook Pro 17" A1297 broad red Vertical Lines
i was solved the issue before its with the gmux can you attach the picture with the lines ill confirm to you is the lines same i got. sorry if any grammer mistake in my englishComment
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Re: MacBook Pro 17" A1297 broad red Vertical Lines
Thanks Sibhu, no problem about the English, no worries as long as we all understand what you mean.. I am attaching the Photo of the MacBook Problem I am having.. please have a look. Thanks
Attached FilesComment
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Re: MacBook Pro 17" A1297 broad red Vertical Lines
Any help will be greatly appreciated.... Please educate me, thanksComment
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Re: MacBook Pro 17" A1297 broad red Vertical Lines
this looks like a tipical bad bga chip. even if u have it new can probably be the cause.if video ram are the same exact chip no need to change the vram resistor.
u can however read somewere how to disable the dedicated amd chip and see if with integrated grapghics card u have all fine. if so probably bga chip is still a bad one.Comment
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Re: MacBook Pro 17" A1297 broad red Vertical Lines
Thanks., let me check... can you inform me from where will I get a good working AMD chipset???Comment
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Re: MacBook Pro 17" A1297 broad red Vertical Lines
I have heard this term "VRAM strapping resistor settings"..I googled it but could not find definite answers.. If someone has the time, & explain this term to all of us who are eager to know what is this "VRAM strapping resistor settings", how does it work so close with the GPU that if the setting is place wrong we will not get any video. Thanks in advance....Comment
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Re: MacBook Pro 17" A1297 broad red Vertical Lines
reflow VRAM chipsComment
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Re: MacBook Pro 17" A1297 broad red Vertical Lines
I have done this but nothing happens, just wanted to know what "VRAM strapping resistor settings" really mean???Comment
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Re: MacBook Pro 17" A1297 broad red Vertical Lines
I am so surprised that I being new in this field., many people are using this term "VRAM strapping resistor settings" but no one is considerering informing me what is this setting. Can anyone help me learning this term. ThanksComment
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Re: MacBook Pro 17" A1297 broad red Vertical Lines
Info in the schematics is often not exhaustive and can be even wrong. Resistors must be checked on a working board with same GPU, same VRAM vendor and size.Attached FilesOpenBoardView — https://github.com/OpenBoardView/OpenBoardViewComment
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Re: MacBook Pro 17" A1297 broad red Vertical Lines
Here you go, thanks a lot... I appreciateComment
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Hello, I have a screen in where sometimes when I open it pop-up vertical multicolor lines (I would say the most of them are green). If I tun off and turn on the screen the lines dissapear or if I leave open the screen after approximately five minutes the lines gone. I measured the below voltages on the main PCB and on the T-CON board and the voltages are the same when it doesn’t display the vertical lines and when it displays the vertical lines. Also, I cleaned all the connectors very good with IPA. I moved back and forth the connectors and the COF tabs but the vertical lines didn't displayed... -
Hello,
i order a t-con because i had bad colors on my SONY KDL-40V3000 :
With the new t-con the color are good but there are vertical lines on all the screen :
I've tried the old t-con and it returned to the initial issue (bad colors but no vertical lines)
Is there a way to fix the vertical lines on the new t-con ?
Thank you for your help
gpo23... -
Thanks for offering your assistance with this. I'm an electronics enthusiast with moderate level of competence (have a decent lab with two power supplies, microscope, DSO, hot air, good iron, can competently work at a component level on SMDs, design and solder own PCBs etc). I really enjoying fixing things and learning new stuff so took up a free 58" LED TV and have been googling and watching Youtube videos to see if I can fix this! I am happy to go down to individual component replacement/strip replacement etc - it's all in the name of learning.
The issues are as follows: the... -
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Hey everyone,
I bought a MacBook A1990 with no screen. I bought it knowing the motherboard was defective but wasn't sure what the problem was until I received it. It actually turns on but as you see from the attachment, it has vertical stripes, on an external screen!!
The board is neat. Not opened before for sure. Just a little dust, nothing more.
Recovery using wifi can be opened, as can also be seen in the photo but it doesn't go all the way through after connecting it to a wifi. It downloads the initial Recovery files but never completes the rest of the...
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