Hello,
Does anyone have the schematics for the backlight circuitry for the M15R5 Ryzen edition?
Your help is very much appreciated...
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Common Parts Library - Datasheets
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ncp81208 datasheet
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Windows 10 key?
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General Electronics Technical Discussion
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Citronic AC-1USB Output Too Loud
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Epson l3110 dump
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-
Today, 07:59 PM
-
Having this very weird issue.
The owner of this laptop complained about screen being intermittent when opening and closing, and has been using the laptop on a thunderbolt video connection since the screen failed.
I swapped with a working screen from an A2141 waiting for parts.
The Os exhibits this weird behavior where it boots to to 1/3 the status bar, then it makes the boop sound. It's at the log in but for whatever reason the desktop isn't loaded.
The laptop boots fine into recovery mode. I updated from Monterey to Sonoma and the laptop still has...04-27-2024, 01:37 PM -
Is it posable to retrive a windows 10 key from a rebuilt computer?
I was told the hard drive has a bad section and needs to be replaced.Today, 02:36 PM -
can anyone help me remove panasonic CF-LV8SDDZTF
model CF-LV8SDDZTF
serial 2HKCC48561
borad number DHLB1434ZC/X1
...Today, 06:02 PM -
Hi, have a HP workstation Z2 Mini 4G for repair with CPU vcore missing.
The resistance at the output of CPU vcore coils, is less than one ohm so I think CPU could be damaged, but no mosfet are damaged.
It mounts an i7 8th gen, and have only i5 7th gen for test, but I think it is not compatible.
Without CPU in the socket there is no short, but there is no vcore voltag, and it emits a beep like no detecting ram.
The controller chip for cpu vcore is a MP2949A, and has no enable voltage at pin 37.
I wonder which circuit generates this enable...04-22-2024, 12:35 PM -
I downloaded a BIOS file from Lenovo and once I extracted the actual BIOS from the executable, it is 16MB in size, but my IC(Winbond 25Q80DV) is only 8MB in capacity. I have read you can trim the BIOS file with a hex editor but I can't find any instructions on specifically what you will remove.04-27-2024, 10:55 AM
-
Hi
I have a Citronic AC-1USB.
When I run a turntable into it and then try to record it. The volume is too loud and distorting. In the red. Mainly 12” Singles. I haven’t tried a CD into it yet. I’m wondering if there is any way to bring the volume down inside the unit itself. Change a part or two. Put a small pot somewhere as there are no adjustments at all in there. I’m looking for the schematic but not found one yet.
Heres the circuit board inside.
Cheers
[ATTACH=JSON]{"data-align":"none","data-size":"full"...Today, 06:17 AM -
[COLOR=#262626][FONT=Roboto][SIZE=16px]I'm trying to locate either a schematic or a picture of the board for this meter. A customer was testing voltage while in continuity mode and blew the fuse and 2 resistors. Unfortunately, the 2 resistors are burned beyond recognition.[/SIZE][/FONT][/COLOR][COLOR=#262626][FONT=Roboto][SIZE=16px]I'm trying to locate either a schematic or a picture of the board for this meter. A customer was testing voltage while in continuity mode and blew the fuse and 2 resistors. Unfortunately, the 2 resistors are burned beyond recognition.[/SIZE][/FONT][/COLOR]Today, 05:47 PM
-
Hi,
i've got for repair Lenovo L340-15IRH fg541/fg741 nm-c362 rev 1.0, laptop have instant short 20v 0.20amp draw, lv5083a goes to 100degree, i've removed 1 shorted cap next to the IC and short still remain, from look of it short comes from legs 16-25, i can't find what this IC i believe is 3/5V regulator?
First mosfets normal 20v Source and drain and Gate 25v...Today, 11:43 AM -
Hello,
My Asus monitor stop working today !! I found the problem on the main board, the power supply board is ok. It's Q9, a mosfet but I have no idea what are the specs since I don't have the schematic for that monitor !!
Can someone help me identified this mosfet ?
Thank you !04-16-2024, 01:15 PM
-
can anyone help me remove panasonic CF-LV8SDDZTF
model CF-LV8SDDZTF
serial 2HKCC48561
borad number DHLB1434ZC/X1
...Today, 06:02 PM -
Hi,
i've got for repair Lenovo L340-15IRH fg541/fg741 nm-c362 rev 1.0, laptop have instant short 20v 0.20amp draw, lv5083a goes to 100degree, i've removed 1 shorted cap next to the IC and short still remain, from look of it short comes from legs 16-25, i can't find what this IC i believe is 3/5V regulator?
First mosfets normal 20v Source and drain and Gate 25v...Today, 11:43 AM -
[COLOR=#262626][FONT=Roboto][SIZE=16px]I'm trying to locate either a schematic or a picture of the board for this meter. A customer was testing voltage while in continuity mode and blew the fuse and 2 resistors. Unfortunately, the 2 resistors are burned beyond recognition.[/SIZE][/FONT][/COLOR][COLOR=#262626][FONT=Roboto][SIZE=16px]I'm trying to locate either a schematic or a picture of the board for this meter. A customer was testing voltage while in continuity mode and blew the fuse and 2 resistors. Unfortunately, the 2 resistors are burned beyond recognition.[/SIZE][/FONT][/COLOR]Today, 05:47 PM
-
Hello,
I have an HP 14-dq0055dx laptop here that came in for boot looping. It was previously taken to another shop and they tried flashing a BIOS firmware to the chip, so I cannot take an original dump. For a second or two, a message will come up on the screen that says:
This loop will go on for as long as you like. I let it run for about 12 hours and came in the following morning and it's still looping.
Motherboard model number: DA0PAMB46A1 REV: A
Secondary motherboard model number: 0PAB
SKU: 685K4UA
Attached is the latest...Today, 09:11 AM -
Hello,
I've been working on this laptop for a few hours and I am stumped. Still learning this kind of troubleshooting. Hoping someone can help.
[U][B]Computer Information:[/B][/U]
Model: Lenovo IdeaPad Gaming 3 15ARH7
Motherboard model: NM-E211 Rev: 1.0
Schematic, Boardview, & FlexBV Free - Attached
[U][B]Problem:[/B][/U]
The computer does not charge the battery or power on also does not power on with power adapter only. Battery have no charge on it at all (reading mV on battery charge). When connecting the power adapter...Yesterday, 01:27 PM -
hi all, got this macbook with dead trackpad. after some investigation i found that fuse is bwlown. it's marked with a K on it. anyone kjnow it's value ? it is a 0402 package.
another problem is: i tried another trackpad that was working fine, but the feedback sensor was not. all volts are present, but the click mechanism isnt .Today, 10:48 AM -
Bought from a liquidator and nonworking on Ebay, and has a admin password set. Dell generated a code that didn't work, then said there is nothing else they could do. I've tried desoldering and flashing a bios, but wouldn't boot afterwards(beyond my limits). I reflashed my backup and it works again. I wrote a password cracker in powershell, but never got a hit. Not sure what else I can do.
Alienware 17 R4
Service Tag: D154PH2
Thank you for anyone that can help.Today, 05:28 PM -
Hey folks, I have this iPad Pro 12,9" 4Gen A2232 here with no charging issue. The main fault was a crossed pins / faulty USB charging port due a bad cable.
So I started to replace this parts:
- replaced usb-c port -> no result
- replaced battery -> no result
- replaced usb-c chip CD3217B12A -> no result
- replaced 343S00326 -> no result
- replaced 343S00327 -> no result
- replaced 343S00328 -> no result
I have no more ideas for this issue. There is no short on the whole board, and the iPad is working fine...Today, 05:37 AM -
Is it posable to retrive a windows 10 key from a rebuilt computer?
I was told the hard drive has a bad section and needs to be replaced.Today, 02:36 PM -