AXG voltage only comes up under heavy graphics load.
As you have working board, compare readings between both boards.
As you have working board, compare readings between both boards.
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820-3115 not recognizing screen
- Thread starter Chuck60
- Start date
Check both boards in the same condition; LCD connected.
Be sure L9080 is good.
Be sure L9080 is good.
LVDS clock signal comes from PCH; you should change it.
Did you comàre diode mode to ground readings between the boards?
Did you comàre diode mode to ground readings between the boards?
Stencil must be marked...
That BGA stencil, should have balls size marked on it.
Balls should be 0.3mm. Ball size should indeed be marked on the stencil, you can't use a random stencil, only stencil for 6/7 series mobile chipset will line up.
If you have a decent BGA rework station you can buy pre-balled PCH and solder it lead-free. Will save your time and sanity.
If you have a decent BGA rework station you can buy pre-balled PCH and solder it lead-free. Will save your time and sanity.
Chuck60
Member
Hi, I just wanted to recap. I wanted to find the exact reason why I wasn’t getting all my signals for lvds. I’m not sure this is correct but on pin 458 of u1800 I have a dead 0.00v short I removed (R2465, R2460, C2465,C2466,C7781,u7800) on this line and on u7800 Pin 1 (PP1V05_S0_PCH_VCCADPLL)
I still have a dead short. I’m guessing it’s directly from PCH. So I’ll go ahead and replace
thank you 2informatico and piernov
I still have a dead short. I’m guessing it’s directly from PCH. So I’ll go ahead and replace
thank you 2informatico and piernov
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Chuck60
Member
Hi, @piernov thank you for you help honestly I’m gonna Use a modified digital cook top So I’m guessing it’s not classified as “decent” and I have a hozan bga hot air from the top. I also have a Quick 861On my desk. I see you’ve already answered my question About buying a new PCH above so I’ll buy it new Let’s see how this goes wish me luck that I’ll pull out a miracle
honestly I’m gonna Use a modified digital cook top So I’m guessing it’s not classified as “decent” and I have a hozan bga hot air from the top. I also have a Quick 861On my desk. I see you’ve already answered my question About buying a new PCH above so I’ll buy it new Let’s see how this goes wish me luck that I’ll pull out a miracle
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