Don’t worry about this, you can reach about 40C just idling in Hekate (moreso in Linux) I would boot L4T Ubuntu and charge the battery up greater than 1000mAH - connect heatsink and fan (don’t worry too much about applying fresh paste. Afterwhich point Hekate should click on and report proper battery stats.
Following I would reflow the Wifi IC and see if that restores any functionality in Ubuntu
Finally I have received a new bunch of Wifi chips. I have replaced the old one but Wifi is still not working. While probing around the Wifi chip I came across one trail which has a resistance to ground of 2.4 ohm. I have removed every component I could find connected to this line from balika011 board view but the resistance has not changed.
Apparently there is something else connected which leads to this resistance but I cannot find what. Do you have any idea of where this trail leads to, apart the components that I have highlighted in the pictures above?
As far as I can see, this is BT VDDIO/VDDO
Is the short to ground present with the WIFI IC removed?
Also can I ask what’s going on with this board? there is flux on every single component, it looks as though somebody has tried to reflow everything. I would take the opportunity to thoroughly clean the board of all contaminent attracting flux to avoid any other potential issues
The short is not present when the WIFI IC is removed. I have tested every Wifi chip I got from the lot and all of them turned out not to work on my Switch. Bluetooth is also not working.
So, I got a Wifi IC (a Cypress instead of a Broadcom, as the original one) from another board and I got Bluetooth back. However, like the original IC, WiFi is not working and a buzzing sound comes out of the Wifi IC when running Ubuntu or Android. I measured the resistance every component close to the WiFi IC and everything seems fine. From a voltage measurement point of view, Vout3p3 which powers on the WLAN and is generated internally stays at 0V. Could it be that the WLAN is disabled in the WiFi firmware? Do you reckon I should get a Broadcom instead?
I noticed that the eMMC was flashed with FW 7.0.4 but the switch had 13 burnt fuses. So, I updated to FW 10.2.0 and now only the first logo is shown when booting normally. I suppose the second logo is not shown because the WiFi is somehow not working.
Any idea? Thank you for your support.
Then it can only be the IC itself at fault or as a result of a bad install/reball, I’d check the corresponding pad/ball of this rail on the IC out of circuit to confirm if these chips are bad
Provided there is no shorts on any of the internally generated rails or VIN after install, if WIFI/BT functionality doesn’t work then it could also be a secondary issue of the chips not being programmed for Switch
I’m not to worried about the buzzing noise (provided none of the reliant rails are shorted) as this is typical even on good boards
I would just veify your getting continuity from the antenna to the 6-pin package (sorry no clue what it is… maybe an RF switch… no clue) and test resistance to ground readings on all six of it’s pins and verify they compare well a to known good board, after measure across each opposing pin… sorry I can’t be more detailed to the test procedure but it’s the best I can suggest without knowing what this component is
They’re both the same so won’t make a difference provided the installed FW on them is meant for Switch (pulled from donors and reballed or propely programmed by the seller/s)
If everything I mentioned above checks out with the IC installed and no rails are shorted or being dragged down in any way and the reball/install is good, then we’re left with the option of it being an SoC side issue… there is one way to semi-verify this in your case by checking to see if WIFI reg enable is on
If the point/s in blue (you’ll have to solder a fly lead upto this point as the EMMC has to be connected and the console prompted to boot) aren’t high then the SoC isn’t even telling the IC to turn on WIFI related rails, which would point to a bad or open line from the SoC being the issue
