Re: 42inch Touch Screen wont power on
okay so i re esembled it and tested pin 3 and 2 and i got 14.54 v
okay so i re esembled it and tested pin 3 and 2 and i got 14.54 v
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Re: 42inch Touch Screen wont power on
So, I've been away for a while from this thread...
Bring me up to now:
Have you got any output voltages, at all, on the power supply?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: 42inch Touch Screen wont power on
okay guys sorry re tested everything, found some unusal results to say the least.
CN04
1 0
2 -351.7 mv
3 -351.7 mv
4 0
5 0
6 0
7 -349mv
8 -349mv
9 5.24 v
10 2.94v
However with the power off doing a continuity test and touching a common ground pins 1-8 all show as a ground????
CN03
1 4.2mv
25.2mv
CN06
1 7mv
2 4.2mv
3 Blank
4 Blank
5 gnd
6 gnd
7 gnd
8 gnd
9 .4mv
10 .4mv
11 .4mv
12 .4mv
This again is unusal pins 9-12 show as a ground aswell ?
have uploaded pictures let me know where to go from here guys.Attached FilesComment
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Last edited by retiredcaps; 01-02-2012, 12:54 AM.--- begin sig file ---
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If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.
We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.
Please do not post inline and offsite as they slow down the loading of pages.
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--- begin sig file ---
If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.
We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.
Please do not post inline and offsite as they slow down the loading of pages.
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Re: 42inch Touch Screen wont power on
Sorry guys i did this with the cables pulled out because i thought when the relay clicked it would turn the power off...
i redid all the tests and the volts are slightly diffirent
CN04
1 2.6mv
2 5v
3 0.53v
4 0
5 0
6 0
7 .5v
8 .5v
9 5.24 v
10 4.49v
I tested for volatage drop on pin 10 when pushing on off no change voltage stayed solid.
CN03
1 4.2mv
25.2mv
CN06
1 .5v
2 .5v
3 Blank
4 Blank
5 gnd
6 gnd
7 gnd
8 gnd
9 -.4mv
10 -.4mv
11 -.4mv
12 -.4mvComment
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Re: 42inch Touch Screen wont power on
ON the main board i followed the power button switch and it has 4.49 volts and drops to 0v when pressed. However on the opposite side where pin10 (on the power supply) connected to the main board we are seeing no 0v drop.
Does this determine there is a fault with the main board? is there a way i can short pin 10 to see if the power supply fires up to indeed confirm this theory?
Would you like pictures of the main board?Comment
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Re: 42inch Touch Screen wont power on
Do you have a 2.2k - 4.7k resistor; or can you acquire one (e.g. from RadioShack)?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: 42inch Touch Screen wont power on
Use the standby rail to pull the PSON line to about 5V. The 2.2k-4.7k prevents any damage from potentially excessive voltages (PSON might only want 2-3V), although that would be a very rare possibility I would suggest it anyway.
Get a 1/4W (quarter-watt) 5% resistor of any value from 2.2k (2200) to 4.7k (4700) ohms.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: 42inch Touch Screen wont power on
Sorry guys i have been away on business and just got back got the resistor and going to try it tonight.
If the power supply operates correctly which i think it will, how can i go about identifying what this main board is so i can seek a replacement ?
As i have tryed to google to numbers on it and returned no results.
Thanks GuysComment
using this to short ?
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Hi all!
I'm trying to troubleshoot a Microsoft Surface Pro (5th gen) model 1796 that won't power on. Motherboard model is M1007506-015. My priority is retrieving data, but the SSD is integrated so it looks like if I can't repair it it'll need to go to a data recovery company. I've done a little basic board repair before, but nothing this advanced until now. So please forgive my ignorance in advance. š
I found the boardview for this laptop in the forums here, and am able to open it on my PC with FlexBV.
https://www.badcaps.net/forum/troubl...-hardware-devi... -
Hi All,
We've got a HP Envy 12th gen that has been dropped and the LCD panel itself has cracked. The glass is fine just the panel itself is cracked. We ordered a replacement screen assembly using the part number off the HP part surfer website.
Upon installation the touch screen now does not work either in UEFI or win 11. Device manager under the "intel Precise touch and Stylus) menu notes "This device cannot start (code 10) Status_Device_Power_Failure".
I've tried all the usual troubleshooting steps like reinstalling the driver, uninstalling... -
After upgrading the factory 128Gb SSD to a 512Gb WD_Black SN770M, this surface pro lost touch on screen, no touch in windows or in UEFI.
The Human Interface Devices did find touch and stylus but it shows Disabled in windows device manager.
I am not sure if this is a bios problem or hardware problem, already tried reinstall and reset from windows, not working. And now trying to clean/reset the bios.
Computer model is: Surface Pro 9, i5, 8GB memory, 128GB
Serial number: 0F00S2Y22353BF
Intel(R) ME Code Versions:
BIOS Version 12.200.143
MEI Driver... -
original screen was BOE NV156FHM-T07 with On-Cell Touch screen IĀ²C
replaced with what was in my stock, which is IVO R156NWF7 R2 which is also with On-Cell Touch screen IĀ²C
now touch screen works perfectly in UEFI BIOS menu & boot menu. but not working in OS, tried windows & linux too
with original broken screen i can see in device manager touch screen in human interfaces
but with the new screen it's not showing in device manager
is it lenovo blocking it? is it driver missing?
IĀ²C is a headache -
Hello,
I have an HP 15-eh1070wm laptop that came to me for the same reasons I am starting this thread. The charging LED appears when the laptop power adapter is connected and the power LED appears when pressing the power button, but nothing appears on screen.
First thing I did was take off the bottom panel and remove the battery and then press and hold the power button for 30 seconds and then reinstall the battery and power on. The fan spins and this time, the back light illuminates and a brief message appears on the screen for about 1 second saying something along like,...
Comment