reformatt
Badcaps Legend
Last Activity: Today, 12:16 AM
Joined: 02-17-2020
Location: Noosaville
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Each large inductor/coil is for a power rail. Just measure each ones resistance to ground with no power. Any that are 0 ohms mainly. No point troubleshooting a board with a shorted CPU.... -
Schematic/Boardview for FX505DY
[url]https://www.badcaps.net/filedata/fetch?id=2130115[/url]
[url]https://www.badcaps.net/filedata/fetch?id=2130116[/url]
Check
L4501 for continuity, 19V at pin 40 CON4501
+LCD_VCC
LCD_BACK_PWM
LCD_BKEN_CONhttps://Schematic/Boardview for FX50...> LCD_BKEN_CONSchematic/BoardviewLeave a comment:
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Load your board in FlexBV, go to Preferences, search string and search server. Use the minimum string (like 820-00165), leave off any -A etc. Openboarddata will appear as diode values on the boardview if present, and you have Notes/Solutions on the RHS with power sequence, USB-C checks etc.Leave a comment:
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Previously the fix had been to transplant the IC from the damaged flex to a replacement. However, someone has developed a tool to calibrate replacement angle lid sensors.
[url]https://notebooknerds.de/en/nerd-tool-1/[/url]
It's 169 euro, but like all good tools, you'll make your money back on that in the first few repairs.
Also covered in Rossman's video on YT some time ago.
[url]https://www.youtube.com/watch?v=Lxo6l_whDeE&ab_channel=LouisRossmann[/url]https://Previously the fix had been ...a replacement.Leave a comment:
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These things are authored and contributed by volunteers in the repair community. Openboarddata is a repository for this data and is run by Paul Daniels (author of FlexBV). Check out the website at [url]https://openboarddata.org/[/url]
Since this integrates into FlexBV, you can go through the sequence one by one and it will highlight locations in the boardview, rather than having to search for it. Saves buckets of time. FlexBV is worth the investment if you repair boards regularly (Paul now has a free limited function version if you want to check it out). Its based on OpenBoardView...Leave a comment:
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I had something similar recently when a customer attempted to change their own battery. The BQ24780S was destroyed, along with the 3V/5V regulator and there was a dead short on the RAM as well. Usually I do a full coil check on any repair, but in this case I didn't. A few hours wasted by not doing the basics.
I would highly suggest checking around each coil for shorts before investing too much time into it....Leave a comment:
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Well that's good to hear. I was a bit concerned with the CAMM memory that Dell was producing. Sounded they were getting very Apple like at the time but I believe it's an open standard.
Recovery installers for any manufacturer machine are a good sanity check. Especially when you are trying to establish whether you have a hardware fault, or a software/driver configuration problem. HP, Lenovo and Dell all have these available.
Phone support (from any manufacturer, not just Dell) I only use for getting a RMA number. These people are not troubleshooters, they are what they...Leave a comment:
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Reviewing this thread, sounds like SMC not running (PPBUS_G3H is low and no light on charger). Check the following:
PP3V42_G3H present @ C5002
PP3V3_S5_SMC_VDDA @ C5001
PP3V3_S5_AVREF_SMC @ C5125
PP1V2_S5_SMC_VDDC @ C5010
(Often have corroded or shorted caps in these areas around the SMC).
SMC_RESET_L should be high
Check for 12Mhz clock at either side of R5110. DC bias from memory is roughly 1V.
If you don't have status LED on the charger, and SYS_ONEWIRE is 3.3V, very likely you need to replace the SMC. You can always...Leave a comment:
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Power rail names in that sequence are slightly different as they are for later model boards. If you have FlexBV, you can load the sequence from Openboarddata. Alternative is to use the data directly (at least this gives you the correct sequence names):
[URL]https://openboarddata.org/?a=generate&bpath=laptops/apple/820-01041[/URL]
Is PP1V8_SLPS2R present? This is very early in the sequence and is generated by U7800.https://Power rail names in that seq...Openboarddata.Leave a comment:
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Ok tackled this again this morning. I investigated the Task Manager not updating first. This was resolved by some info on this page:
[url]https://learn.microsoft.com/en-us/answers/questions/1339707/help-with-figuring-out-what-is-causing-waitchain-d[/url]
After removing all the DAFUPnPProvider#uuid entries in the HKLM\SYSTEM\ControlSet001\Services\DeviceAssociationService\State\Store registry key, Task Manager now updates correctly and exits cleanly when closed. There were many entries on this system, so it took a lot of DEL and ENTERS to get rid of them all. I had to...Leave a comment:
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For T2, use the CD3217 power sequence instead for troubleshooting.
[url]https://logi.wiki/index.php/CD3217_and_T2_Power_on_Sequence[/url]
Don't focus on 20V negotiation for USB-C, the primary thing to focus on is the T2 power sequence. Rule out DFU first though. A restore wipes the SSD data BTW, so it's often the last resort rather than the first one.https://For T2, use the CD3217 power... primary thingLeave a comment:
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First one was a HP, other was Dell. Only thing in common is Windows 11 23H2 and the last bunch of Windows updates.Leave a comment:
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Windows 11 Start menu/Taskbar hanging
Couple of Windows 11 machines have come in this week with the same issue. After you login, the taskbar will not appear (or just be a black bar). No access to Start Menu. Task Manager (use CTL+SHIFT+ESC) works, however the Performance stats seem stuck with CPU on 100% for Task Manager itself. Trying to exit Task Manager result in it hanging as well. No issue if you boot into Safe Mode.
First machine, tried many things to no avail (System Restore from last Windows update, rebooting in Diag mode, trying to reinstall Windows Apps via Powershell). In the end, I did an in-place upgrade...Last edited by reformatt; 04-23-2024, 10:19 PM. -
Sounds like T2 isn't running, so make sure it's not in DFU. Also check SSD 2.5V power rails for shorts. Common to have corroded caps on the edges of the board on these models.
CD3215 when swapped need to the same model as the others. Best to swap that from a donor board, plenty of fakes on the market.Leave a comment:
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Are you using a stock Windows installer or the Dell recovery image? For a stock image, failure to see the SSD is usually solved by downloading the Intel RST drivers, extracting to USB, and when you get to the select disk part of setup, select Load Driver and point it the folder on the USB where the inf files are. Possibly need the Serial I/O drivers as well.
Other alternative is to create a recovery installer, as drivers etc are all built in.
[URL]https://www.dell.com/support/home/en-au/drivers/osiso/recoverytool/w2021[/URL]
Curious to see if Dell truly have...Last edited by reformatt; 04-23-2024, 04:18 PM.Leave a comment:
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I first check the board under the microscope for any corrosion etc. Always like to rule out an obvious hardware issue first. As it's an A1990, the edges of the board near the fan intakes are obvious areas to check. Also check WIFI rails etc for shorts.
If that is ok, then I try to see if it comes up in either the Bootpicker or in Target disk mode (on Intel MAC's, use Option or T keys). I usually try to recover user data via Target Disk mode to another MAC (via a Thunderbolt 4 cable) before wiping the system with a DFU restore. Each time I've used this, the host MAC won't accept the...Leave a comment:
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If you were fixing a car or something, that might be appropriate. But way too big for this application.
From the boardview, the connection to Q7707/2 is from a via underneath that area. I'm guessing its to the test pad, which has been eaten away. Since there are no other connections on that side of the board, you'll need to run a jumper that wraps around the board from one side to the other. You will need 0.1mm enameled wire plus some way to tack it down. I use dabs of conformal coating (which you cure with a UV lamp).Leave a comment:
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Most common issues on iPads are bad charging connector or bad Tristar IC. Bad batteries (or no battery sense comms) usually result in boot loops. Use 3uTools to see if you get any battery sense data at all.Leave a comment:
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Fair enough. The references are component designators in the schematic/boardview, and on the silkscreen of the board. Manufacturers don't release this information willingly. If it's in the public domain, it's only because it's been obtained unofficially (stolen or leaked).
Now for this model, I believe it's a MS-17G11 motherboard (update if this isn't correct). Boardview is available for that on this forum - it's in CAD format so you'll need to use OpenBoardview for example to view it. There isn't a schematic, however the design is pretty similar to other MSI models that are available...Last edited by reformatt; 04-14-2024, 11:48 PM.Leave a comment:
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+19V is usually present on the LCD connector in most designs regardless of power state, not just MSI. So always a good idea to remove the battery for any laptop when plugging in any connector. Switching this voltage isn't required as the LCD connector is not considered hot plug, and LCD control is from other signals.
I'd first be checking your +19V power rail isn't shorted to ground. Check it at the current sense resistor PR251 (or on pin 40 of CN11). If that's ok, then check for presence of +3VALW for the EC at PU26 pin 3 or PC225. You should at least have +3V on one side of your...Leave a comment:
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