Did you ever make progress on this? I'm interested because I have a very similar problem on a thinkbook. Works, but won't charge. 3.3v on sda and sdl, but 0 on PWR_CHG_IBAT
It detects battery info, but incorrectly ie. 0% capacity after charging to 80% in different machine.
badcapjerboard
Senior Member
Last Activity: Today, 12:15 AM
Joined: 04-20-2023
Location: Jerusalem
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Is there any reason this GD25R256EYIG wouldn't be compatible with original [URL="https://www.badcaps.net/filedata/fetch?id=3584261"]MX77L25650FZ4I42[/URL]?
Does PLC501 getting so hot mean it's probably a faulty vram chip?Is there any reason this GD25R256EYIG wouldn't be compatible with original [URL="https://www.badcaps.net/filedata/fetch?id=3584261"]MX77L25650FZ4I42[/URL]?
Does PLC501 getting so hot mean it's probably a faulty vram chip?Is there any reason this GD25R256EYIG wouldn't be compatible with original [URL="https://www.badcaps.net/filedata/fetch?id=3584261"]MX77L25650FZ4I42[/URL]?Leave a comment:
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Mistake. I meant i used a GD25R256EYIG but used id GD25B256EYLeave a comment:
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Not completely sure what's going on. I had issues with new chips also. tried new adapter. Then i found a chip that the programmer ids correctly and it finally programmed successfully. Maybe I need to create a custom chip instead of using a similar id?
Anyhow, laptop behaved the same with the new file on a different chip. A GD25B256EYLeave a comment:
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Thank you. First i got a verify error. Then i lowered clock to 16ghz and got reg error. Lowered more got the same. [ATTACH=JSON]{"data-align":"none","data-size":"full","title":"image.png","data-attachmentid":3584264}[/ATTACH]Thank you. First i got a verify error. Then i lowered clock to 16ghz and got reg error. Lowered more got the same. [ATTACH=JSON]{"data-align":"none","data-size":"full","title":"image.png","data-attachmentid":3584264}[/ATTACH]...
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Sorry found it SN: PW020ZLWLeave a comment:
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Lenovo Thinkpad X1 Extreme Gen 4 Wistron 213015-1
This laptop had a hard fall I was told. I'm not able to read the serial number.
I would get 3 white lights at the power button when plugged in and then off, but still an orange charge light(most of the time).
PLC501 gets hot, into the 60s C. It has 1.24v PRC307 is the next hot thing around 40c and PUC301 get's a bit warmer than the other 4 PUs next to it
PLC301 has resistance to ground of .55ohms but i'm not experienced enough to know if this is normal for such gpus? Voltage on these coils is .75v
Otherwise i wasn't able to find anything else getting warm even when injecting... -
The capacitors pc8910 and 8923 both measured 420-430u and say on them 330. I replaced them.Leave a comment:
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A lot of things look suspicious, but i'm not really finding anything. There is a test point that is destroyed right below that pr9200 i replaced, but everything connected on boardview seems ok it think.Leave a comment:
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I was trying with battery and plug. At one point after holding the power button for a while, when i let go the leds on the button board went on and stayed on. Still no picture.
In that state i checked and there was 1v VCCSA on pl9001, but still no vcc on pl9000, pl8902, pl8903. pl8701 was almost nothing, vcc_pe from the ec was still nothing.
I couldn't get this to repeat.Leave a comment:
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This new for me. Can vcc missing be the whole problem at this point, or do you think startup signals are not triggering from the ec?Leave a comment:
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pu9201 now has +1.05V_DEEP_SUS and +3VPCU, but no VCCIO_EN and no VCCIO outputLeave a comment:
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SLP_S4#_3R is active, i think that might mean it's cutting power to the 2.5vsus for ram, so maybe not supposed to be there in standy?Leave a comment:
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I am still missing +1.2VSUS, +2.5VSUS, and VCCLeave a comment:
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You were right👍 After poking around more i found pr9200 had one end eaten away. I replaced it with a donor and now pu9200 gives 1.0V_DEEP_SUS, but still no vcc. behaves the same
So 2 faults have been damaged/missing resistors in the spill area. I'll keep looking for more.Leave a comment:
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No, i only found 1.4v for VCCSA_SYNC1 nothing for the othersLeave a comment:
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Does it make sense to take off the mosfets in the spill area to check them while the signals from pu8800 are not going to pu8900 etc, like VCORE_PWM1 and VCORE_CS1.?...Leave a comment:
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Yes i was using barrel the whole time for testing. I was just noting the usb-c outputs 5v. I tried input now on type c and it takes 19.8v .01a and board behaves the same as with barrel....Leave a comment:
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Note: I checked the c-port which i hadn't done before and it is getting 5v and cycling, though usb-a ports get nothingLeave a comment:
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These are the spill area with a usb microscope as i don't have lenses on the optical to show large areas. Some of those fets have water marks, but i'm not sure how to test them properly. @[B][URL="https://www.badcaps.net/member/149220-mcplslg123"]mcplslg123[/URL][/B]These are the spill area with a usb microscope as i don't have lenses on the optical to show large areas. Some of those fets have water marks, but i'm not sure how to test them properly. @[B][URL="https://www.badcaps.net/member/149220-mcplslg123"]mcplslg123[/URL][/B]These are the spill area with a usb microscope...
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