Acer Chromebook 11 C733 Wifi Issues

I have several different devices that are having issues seeing any wifi networks. I have had it where I can get them to connect to a network for a short while, maybe an hour or so, and they will suddenly loose any connection that they have.

My guess is that the issue was with the actual wifi card because I would check the network settings and see that the wifi was turned off and when I try to turn it back on it will shut back off. I have tried reseating the wifi card on the unit with a couple days of success only to have it happen again. I've attempted to replace the wifi card and cleaning the M.2 slot with compressed air. At this point I'm not completely sure what to do. Any help would be greatly appreciated.

Accepted answers

jmehnert

@easd Yes! I was able to get into contact with someone at Acer who was able to get me connected with their engineering department, and we were able to determine that the issue was with the actual placement of the rubber square on the Logic board.

C733 wifi rework SOP.pdf

All comments

Easwar

Hi @jmehnert,

Did you check with the ISP tech support.

jmehnert

@Easwar at the moment we have not reached out to our ISP, as there are other chrome devices on the same network and they have not had this issue.

Easwar

Hi @jmehnert,

Check for updates yourself

Turn on your Chromebook.
Connect your Chromebook to Wi-Fi.
At the bottom right, select the time.
Select Settings .
At the bottom of the left panel, select About Chrome OS.
Under "Google Chrome OS," you'll find which version of the Chrome operating system your Chromebook uses.
Select Check for updates.
If your Chromebook finds a software update, it will start to download automatically.

jmehnert

@Easwar They should all be up to date. The most recent one I've got having this issue is on version 96.0.4664.111, which came out last week as of posting this.

billsey

IIRC your C733s come with an Intel 9560 WiFi card with two antennas connected to it. Are you connecting to a 2.4GHz network or a 5GHz? Which bandwidth is selected?

jmehnert

@billsey Yes we use the stock 9560 cards, and it's a dual band network, so it should support both frequencies.

billsey

Ah, but when it's failing which mode is it in?

jmehnert

Ah, 5GHz mode.

billsey

Test with 2.4GHz just to make sure it's not a band issue.

jmehnert

We tested with several different devices, and the issue does not seem to be effected by the bandwidth. It happens regardless.

easd

I am having the same issue with our C733s. Have you found anything to fix the problem? I am replacing the wifi cards

jmehnert

@easd Yes! I was able to get into contact with someone at Acer who was able to get me connected with their engineering department, and we were able to determine that the issue was with the actual placement of the rubber square on the Logic board.

C733 wifi rework SOP.pdf

JasonSysAdmin

What was wrong with the rubber square? I have them on the logic board but they are about 1 cm to the left of the image in the pdf you provided. How does the rubber square placement improve the wifi reliability? We have tons of these 733's with the wifi failing.

jmehnert

@JasonSysAdmin from what I was explained, the issue is that if the placement of the rubber square isn't correct, then it can cause the logic board to flex. The flexing causes the pins to either shift, or pop out of place of where they are suppose to be. The result being wifi loss.

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