trepachka
Badcaps Veteran
Last Activity: Yesterday, 04:39 PM
Joined: 10-06-2022
Location: Vernon Hills
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Jumping the OVP switch did nothing. However, I replaced the TPS chip and the computer is working now. -
Hey, I just came across a T14 Gen 2 with a similar issue. Initially, it came due to a failed PU1801 chip. After replacing the chip, computer works fine off the dock USB-C port. When plugged into the charging USB-C port, as soon as voltage switches from 5V to 20V, the whole thing resets and repeats. I am going to follow your suggestion and jump the the OVP switch to see if indeed it is causing this issue.Leave a comment:
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The TPS65988 was replaced. I also placed the original chip into another motherboard and I can confirm it works. Having eeprom reprogrammed is another good idea. I just don't have the tools for it.Leave a comment:
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I replaced them both. Same resultLeave a comment:
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I stripped the last 1K from the file to make it match the size. However, after reflashing the bios, computer is not even attempting to boot. I tried another bios file from this thread and the computer boots but with obviously the wrong service tag number.
Can you do me a favor and fix the bin file I posted in post 44 ? Thank you.Leave a comment:
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The file in post 43 when unzipped is larger in size by 1K. It's 16,385K in size. It should be 16,384KLeave a comment:
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Hello,
I have this Dell G15 5515 that is fixed now. However, it is doing everything except posting. I suspect the bios is corrupted.
Please, help me fix the bios file.
ST# C3Z2YF3
EX: 26361711039
Thank you....Leave a comment:
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Were you able to figure out the issue with the motherboard? I am in a similar predicament. Computer is stuck @ 5V, drawing 0A current. Everything appears to be fine. I replaced both the PD chip and the ISL chip just in case to no avail.Leave a comment:
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Great. I will order both IC chips. This will take another 10 days, unfortunately. Thanks for your helpLeave a comment:
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Hey, can anyone please identify this IC chip marked "DTRELA" for me? I don't have the schematics and I am not familiar with this IC chip.Leave a comment:
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Hello, both IC chips were replaced and that short is gone. However, the motherboard is not switching to 20V, stays @ 5V 0.8A.
I identified 2 additional IC chips that need to be replaced, they are both mad hot. I unsoldered both chips from the motherboard and there is no current drawn by the motherboard.
Without the schematics I am relying on this forum to help me.
Take a look at the attached photos:
"DTRELA"
"R9EMF" - this one looks like SY8388B3. Perhaps, some could correct me.
Can someone help me identify these...Leave a comment:
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I can confirm the bin file in post 39 works fine. I just used it on an Inspiron 5515 machine with corrupted bios and computer is working now.
Upon initial boot, you will be asked to enter service tag# (ignore for now the high-pitch tactile sound every time you press any key) after which you need to go to bios and pick the correct model either Inspiron 5415 or 5515. Next boot, hit Fn-X combo to get rid of that high-pitched tactile sound. DoneLeave a comment:
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The charging IC is ISL95522A. I am currently getting 20V on pin 17 (DCIN) but 0V on pin 16 (ACIN) which is supposed to have 20V on it without the battery attached.
Resistor PRB9 has 20V on pin 1 and 0V on pin 2. This pin is connected to pin 16 of the IC. So, I am not sure how that happens.
Based on the schematics, the only other component that can pull the voltage to 0 on pin 16 is PQB2 mosfet if PQB2_GATE signal arrives at this gate.
I suppose for testing purposes I can remove PQB2 mosfet to see if pin 16 gets 20V back.
I am seeking suggestions....Leave a comment:
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Thank you. Luckily, I found a local seller and already placed the order. I will let you know if that did the trick.Leave a comment:
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I would think having a failed OVP would result in 5v at USB-C port. Is it possible that the chip you installed is of poor quality with varying threshold? Hence, you get this forever loop with threshold constantly going over tolerances?Leave a comment:
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Lenovo Slim 7 14IAP7 NM-E412 shorted IC identification
Model: Lenovo Slim 7 14IAP7
Motherboard: NM-E412
Please, take a look at the enclosed photo and help me identify this IC. It is currently shorted, no boardview or schematics, I am unable to make out what this is.
The chip has markings "Y182" on line 1 and "2898" on line 2.
Thank you.... -
When you say "it will continuosly reset pd negotiations with the power brick", are you still getting 20V at the USB-C port or does it stay at around 5V?Leave a comment:
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Thank you. Do you also happen to have boardview?Leave a comment:
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Seeking boardview+schematics for Dell G15 5515 Ryzen Edition LA-K453p
Model: Dell G15 5515 Ryzen Edition
Motherboard: LA-K453p
Service Tag# 838W8R3
Computer is currently dead, 20V doesn't go beyond the first 2 mosfets as there is 0V on the gate. My next order of business would be to find the charging circuit, ie the charging chip.
It would be great if someone uploaded boardview+schematics for it.
Thanks. -
There are 2 of these on the motherboard: U6201 and U6301. I will order the chips later today and report the outcome.Leave a comment:
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