Hi, I'm working on an ASUS ROG G14, GA410QEC board. U1203 (TPS25810 but the schematic has it as SN1507044RVCR1) has shorted the +5VSUS rail. Is it safe to power up to test and subsequently use the laptop until I receive the replacement part?
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Last edited by MicroSMD Lab; 04-01-2024, 04:57 PM. -
I beleive this tps ic is usb type c controller. If the laptop is powered by usb c adapter,you need to replace it. however, if barrel type adapter is used,you can turn it on without this controller.
I have not seen the schematic, so this is just general opinion. proceed at your own risk. -
Asus ROG Zephyrus G14 GA401QM Schematic and Boardview - Badcaps
Thanks for the assistance mcplslg123, the schematic is here if you want to take a look. Luckily I was able to find one on an hp envy board but there is another short, PU8805 (uP9030P) is heating up.
Is there any hope for the laptop to work without this one... I see there are 3 more on the board... is it possible to swap out with another to have a working laptop until this replacement arrives?
Sorry if I should have started a new thread for this.Comment
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History of the repair: Customer tried to charge with a make shift battery/ usbc cable and the laptop stopped working. I checked caps around the USB C port and found the +5VSUS line shorted, 0 ohms. U1203 heated up with voltage injection, after I replaced it, the resistance went to 1.6 ohms. Voltage injection again showed PU8805 as the heat source, upon removal the resistance of +5VSUS went to 115 ohms.
According to the schematic for the QM variation, there should be a total of 5 of these load switches on the board, I confirmed 4, the other (U7101) could be under the heat sink, which, I did not remove.
To me it seems like PU8805 supplies power to the HDMI port and PU8803 seems to provide power for audio of some sort and apart from the +3VA_EC, it has the lowest current limit. My customer may not need HDMI but would need audio.
I would like to know if the laptop should work, except hdmi, with PU8805 missing or can I use PU8803 to replace PU8805 and leave PU8803 missing but still have audio to the speakers?Comment
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PU8805 seemed essential so I ordered the replacement. It is a relatively expensive part. I ordered from eBay for $20USD and after installing it I checked the resistance on the +5VSUS rail and it dropped to 6 ohms. Thankfully I found a cheaper source on Aliexpress and ordered a few as backup. After installing another, the laptop is booting to bios.Comment
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