daniel_andrei1996
Member
so, I have an 820-2850 board that's acting weird.
If I plug in the charger, the board will power cycle somewhere between 5-20 times roughly (pulsing the s0 rails) until it will boot further (I can tell because the optical drive will make a noise). Sometimes I get picture when this happens and it'll work fine for a while, but the screen eventually cuts to black. Other times the screen will stay black but the board will stay on and stop power-cycling
I have replaced C9560 so that isn't the problem, sadly
Now, while trying random things I noticed that pressing on U9320 while powering on will often result in a successful boot right away, and image on screen also. What's more, the screen will often go black as soon as I stop pressing it. Because of this, I tried reflowing U9320 thinking it might solve the problem, but no such luck. The board is behaving exactly the same after the reflow.
So, it's clear to me that there's likely a broken connection somewhere. What would be a good way of pinpointing where the faulty connection is so I can reflow it?
If I plug in the charger, the board will power cycle somewhere between 5-20 times roughly (pulsing the s0 rails) until it will boot further (I can tell because the optical drive will make a noise). Sometimes I get picture when this happens and it'll work fine for a while, but the screen eventually cuts to black. Other times the screen will stay black but the board will stay on and stop power-cycling
I have replaced C9560 so that isn't the problem, sadly
Now, while trying random things I noticed that pressing on U9320 while powering on will often result in a successful boot right away, and image on screen also. What's more, the screen will often go black as soon as I stop pressing it. Because of this, I tried reflowing U9320 thinking it might solve the problem, but no such luck. The board is behaving exactly the same after the reflow.
So, it's clear to me that there's likely a broken connection somewhere. What would be a good way of pinpointing where the faulty connection is so I can reflow it?
