I'm a noob at doing MacBook board repairs, it's pretty much a hobby at this point (I buy dead units on eBay and attempt to fix them as practice). I attended Jessa's class and outfitted my bench with tools recommended by Louis and Jessa. This includes a Crest ultrasonic unit. I must be doing something wrong, as about 1 out of every 5-7 boards goes in working (after I fixed them) and comes out not working. I haven't really taken the time yet to troubleshoot those at this point, I'm generally too frustrated and set them aside.
Here's my process:
-8 minutes at 50 deg C
-Lightly scrub the boards with a toothbrush while sitting in 99.9% isopropyl alcohol
-Drip dry for a few minutes (length of time depends upon my patience level at the moment)
-Use canned air or hot air station to gently dry the board off
-Install back into the chassis
Does anyone have a "best practices" list for proper ultrasonic usage?
As best I can tell, I am not dislodging components with the toothbrush. I wonder if it's moisture inside a shielded area that hasn't fully dried when voltage is applied?
Thanks in advance!
Here's my process:
-8 minutes at 50 deg C
-Lightly scrub the boards with a toothbrush while sitting in 99.9% isopropyl alcohol
-Drip dry for a few minutes (length of time depends upon my patience level at the moment)
-Use canned air or hot air station to gently dry the board off
-Install back into the chassis
Does anyone have a "best practices" list for proper ultrasonic usage?
As best I can tell, I am not dislodging components with the toothbrush. I wonder if it's moisture inside a shielded area that hasn't fully dried when voltage is applied?
Thanks in advance!