Re: Vizio M43-C1 No Backlights
As many heat gun BGA reflow experience have noted, it doesn't last. I've done it 2x and each time lasting a couple of months of light use. Early failure symptoms including 1/2 screen going grey+noisy (I think this is the upper BGA as its near the T-CON connection) and/or youtube app would get sluggish. Reflow done with the heat sink removed (much easier on later board designs) Ultra low viscosity (like alcohol) flux to flow under the BGAs. And applied new thermal paste. Just did a third time with a hot air station for better temp control. Anyhow, don't really expect it to last.
As for fan mount, see attached pic for my 40x40x10mm 12V fan (this is a D50u-D1, M43-C1 should be very similar but I've not done mine yet). Fan is just zip tied to the vent holes in the back (zip head inside the chassis so its barely visible on the back) Tapped the switched 12V source at CN212. Quite loud so going to put a pot on it and dial it down (will reduce air flow of course). Previous 5V was very quite so somewhere 5-12V. Greater quiet flow rate is possible with bigger or multiple fans.
As many heat gun BGA reflow experience have noted, it doesn't last. I've done it 2x and each time lasting a couple of months of light use. Early failure symptoms including 1/2 screen going grey+noisy (I think this is the upper BGA as its near the T-CON connection) and/or youtube app would get sluggish. Reflow done with the heat sink removed (much easier on later board designs) Ultra low viscosity (like alcohol) flux to flow under the BGAs. And applied new thermal paste. Just did a third time with a hot air station for better temp control. Anyhow, don't really expect it to last.
As for fan mount, see attached pic for my 40x40x10mm 12V fan (this is a D50u-D1, M43-C1 should be very similar but I've not done mine yet). Fan is just zip tied to the vent holes in the back (zip head inside the chassis so its barely visible on the back) Tapped the switched 12V source at CN212. Quite loud so going to put a pot on it and dial it down (will reduce air flow of course). Previous 5V was very quite so somewhere 5-12V. Greater quiet flow rate is possible with bigger or multiple fans.
Comment