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<blockquote data-quote="Coll6" data-source="post: 8824461" data-attributes="member: 507411"><p>Looking to repair this Nintendo switch but am a amateur. Wanted to get some ideas and advice from others who might understand how some of this works.</p><p>I believe this board is a HAC-CPU-20</p><p></p><p>I know that the chip in the first image is dead. I believe it is an IC dedicated to submitting battery level data? Though I am having trouble identifying the IC. Also would like to know where some of these pads go. Not sure if I am seeing some weird shorts or not since I have nothing to compare it to.</p><p>[ATTACH]182467[/ATTACH]</p><p>The second image shows where I feel the board warming up with the battery and USB plugged in. Nothing hot just warm and I can't seem to identify what side of the board. With the battery connected and USB I see around a 46mA draw. With the battery removed I see a 36mA draw roughly. I have removed M92t36 chip and the draw is completely gone. Though I do think this chip handles charging along with the dedicated battery controller IC. Still trying to understand the datasheets. Definitely going to look for shorts on pads around M92t36 seat with it removed. Though I think the chip itself is fine maybe.</p><p>[ATTACH]182469[/ATTACH]</p><p>Third picture is a spot I might have accidentally blown a component off highlighted in green. I am not entirely sure if it was just an unpopulated spot or if I blew it off. If anyone knows it would be greatly appreciated.</p><p>[ATTACH]182468[/ATTACH]</p><p></p><p>I have a few questions about how the Switch turns on circuitry wise. Is the battery really necessary to turn on the switch? Some phones can be turned on with purely USB power. Not sure if the Switch is the same. I have seen a lot of videos show an example plugging in the battery and the USB to test it. If the battery is required is there an IC that checks to see if the battery is in before the power signal is pulled low? Where does the power button signal actually route to? My USB chip might be bad as well but haven't pulled it off this is where I am at currently. I am sure battery power never makes it to M92t36 chip but USB power does. So there is an open between M92t36 and the battery but no clue where the open is or where the battery power routes to.</p></blockquote><p></p>
[QUOTE="Coll6, post: 8824461, member: 507411"] Looking to repair this Nintendo switch but am a amateur. Wanted to get some ideas and advice from others who might understand how some of this works. I believe this board is a HAC-CPU-20 I know that the chip in the first image is dead. I believe it is an IC dedicated to submitting battery level data? Though I am having trouble identifying the IC. Also would like to know where some of these pads go. Not sure if I am seeing some weird shorts or not since I have nothing to compare it to. [ATTACH]182467[/ATTACH] The second image shows where I feel the board warming up with the battery and USB plugged in. Nothing hot just warm and I can't seem to identify what side of the board. With the battery connected and USB I see around a 46mA draw. With the battery removed I see a 36mA draw roughly. I have removed M92t36 chip and the draw is completely gone. Though I do think this chip handles charging along with the dedicated battery controller IC. Still trying to understand the datasheets. Definitely going to look for shorts on pads around M92t36 seat with it removed. Though I think the chip itself is fine maybe. [ATTACH]182469[/ATTACH] Third picture is a spot I might have accidentally blown a component off highlighted in green. I am not entirely sure if it was just an unpopulated spot or if I blew it off. If anyone knows it would be greatly appreciated. [ATTACH]182468[/ATTACH] I have a few questions about how the Switch turns on circuitry wise. Is the battery really necessary to turn on the switch? Some phones can be turned on with purely USB power. Not sure if the Switch is the same. I have seen a lot of videos show an example plugging in the battery and the USB to test it. If the battery is required is there an IC that checks to see if the battery is in before the power signal is pulled low? Where does the power button signal actually route to? My USB chip might be bad as well but haven't pulled it off this is where I am at currently. I am sure battery power never makes it to M92t36 chip but USB power does. So there is an open between M92t36 and the battery but no clue where the open is or where the battery power routes to. [/QUOTE]
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