crwdns2933423:0crwdne2933423:0
crwdns2918538:0crwdne2918538:0

crwdns2934243:0crwdne2934243:0 jacquesfrank

crwdns2947189:0crwdne2947189:0:

Topcase repair reassembly issues: A2179

crwdns2934249:0crwdne2934249:0:

I’m working on an A2179 2020 MBA. My old friend spilled something in the topcase and right-side keys weren’t working. Everything else was working fine when I took possession.

I did the repair once with a case/battery combination unit. When I powered on, the fan went full speed and the CPU was throttled to a near halt. It booted and worked, but barely. Also, the battery wouldn’t receive charge.

I read elsewhere that behavior can result if there is a thermal sensor somewhere not properly sending information, or if the battery is completely dead. I reseated all of the cables to no avail, so I returned the component figuring there was an error with the battery or its board.

I ordered a better grade battery (from here!) and case. I repeated the repair and I’m getting the same result. I’ve gone through and reseated the cables. Same thing.

So I’m stumped. Here are the basic conditions:

# Previous to disassembly, the CPU worked fine. The only issue was problematic keying. Work arounds included external keyboard.
# Two repairs with different components have both resulted in the computer protecting itself.
# I’m reasonably certain the second battery and its controller are good quality.
# I've come to learn this is a not uncommon issue with MBA topcase and screen repairs, and I even read a conversation about it with an iMac.

Reseating cables hasn’t fixed it. Having said that, I am wondering about some of the cabling around the trackpad. I’m also wondering about the tiny daughterboard just north of the trackpad on the A2179.

I do wonder if something is goofy with the power/fingerprint button. I may order a new one of those. But that shouldn’t be sufficient for the unit to go into temperature protection.

Any thoughts or advice is super appreciated. Cheers!

crwdns2866306:0crwdne2866306:0:

MacBook Air 13" Retina Display 2020

crwdns2915684:0crwdne2915684:0:

open

crwdns2934251:0crwdne2934251:0:

+868812

crwdns2934241:0crwdne2934241:0 jacquesfrank

crwdns2947189:0crwdne2947189:0:

Topcase repair reassembly issues: A2179

crwdns2934249:0crwdne2934249:0:

I’m working on an A2179 2020 MBA. My old friend spilled something in the topcase and right-side keys weren’t working. Everything else was working fine when I took possession.

I did the repair once with a case/battery combination unit. When I powered on, the fan went full speed and the CPU was throttled to a near halt. It booted and worked, but barely. Also, the battery wouldn’t receive charge.

I read elsewhere that behavior can result if there is a thermal sensor somewhere not properly sending information, or if the battery is completely dead. I reseated all of the cables to no avail, so I returned the component figuring there was an error with the battery or its board.

I ordered a better grade battery (from here!) and case. I repeated the repair and I’m getting the same result. I’ve gone through and reseated the cables. Same thing.

So I’m stumped. Here are the basic conditions:

# Previous to disassembly, the CPU worked fine. The only issue was problematic keying. Work arounds included external keyboard.
# Two repairs with different components have both resulted in the computer protecting itself.
# I’m reasonably certain the second battery and its controller are good quality.
# I've come to learn this is a not uncommon issue with MBA topcase and screen repairs, and I even read a conversation about it with an iMac.

Reseating cables hasn’t fixed it. Having said that, I am wondering about some of the cabling around the trackpad. I’m also wondering about the tiny daughterboard just north of the trackpad on the A2179.

I do wonder if something is goofy with the power/fingerprint button. I may order a new one of those. But that shouldn’t be sufficient for the unit to go into temperature protection.

Any thoughts or advice is super appreciated. Cheers!

crwdns2866306:0crwdne2866306:0:

MacBook Air 13" Retina Display 2020

crwdns2915684:0crwdne2915684:0:

open