T431s Can't Detect External Storage (Again)
I'm back with the same issue. A couple weeks ago I had a problem with my external storage and I came here for support. Here is the previous thread. I "resolved" the issue by doing a system restore and didn't have the problem again until now. To summarize the issue...
t431s can't detect external storage.
Under device manager all devices end up under "Other devices". "The drivers for this device are not installed. (Code 28)"
It isn't a problem with any one drive because I've tested the same devices of different manufacturers on two other computers.
Attempting to download and install the drivers for each inidivdual device doesn't help.
Other than regular updates from Windows and Lenovo's System Update tool, nothing has changed that I can notice.
I don't consider system restore a solution to the problem. Since the issue has resurfaced, I don't I want to get into a habit of restoring on a regular basis just to avoid this problem. Any other ideas?
Since the drives are being detected on other computers, it looks like the issue could be with the USB drivers on your computer. Here are a few steps that you can try to fix the issue:
1. Connect the drive to your system.
2. Go to device manager and confirm that they show up under 'Other devices'.
3. Right click on the device and select 'Uninstall'
4. Once it's gone from the device manager, disconnect the external drive.
5. Open a Windows Explorer window (right-click on Start > Explore).
6. In the address bar, type c:\windows\inf and press Enter. For Windows 7 type c:\windows\system32\driverstore and press Enter.
7. Delete the file INFCACHE.1.
8. If you get an error when trying to delete this file, try the following steps:
a. Right-click on INFCACHE.1.
b. Select Properties.
c. Click on the Security tab.
d. Click Edit to edit permissions.
e. Click Add to add Group or User name.
f. Click on the user name under which you are currently logged in.
g. Click on the Full Control box in the lower permissions section, then click OK.
h. Delete the file.
9. Reboot and reconnect the drive. The file should be rebuilt, correcting the problem.
If the issue persists, refer to this link:
http://knowledge.seagate.com/articles/en_US/FAQ/205331en
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Can't detect external monitor, shows only 640x480
Hi,
I'm using a Macbook Pro Unibody 13" 2.53GHz to connect to a Dell 2408WFP external monitor. It worked FLAWLESSLY with my old Macbook Pro using a DVI cable.
1) I first bought the infamous mini-Displayport to DVI adaptor. It didn't work (red static etc. check the page of this product on Apple's store website : you'll see it's a known issue). Cost me 35$
2) I then bought a mini-Displayport to Displayport cable. Thought it should work perfectly. It DOES NOT. The Macbook is apparently UNABLE TO DETECT my Dell and gives it a default resolution of 640x480. Which is ridiculous knowing that the Dell 2408WFP is capable of displaying 1900x1200.
It's really a pain. Does anyone know about this problem or have an idea how to solve it?
Thanks,
P.Ok,
It was neither the cable nor the computer (thanks Apple). It was the monitor's EDID profile. Dell's problem.
There's two ways to fix this. 1) It is possible (I did it) to create a custom profile using SwitchResX. You'll need to hook up your computer to the monitor using a working connexion (I used DVI) and then use the "export" function in SwitchResX. It will give you a text file. In it you'll have enough data to fill SwitchResX' form to setup a custom profile. You'll then need to restart the computer, hook it with the Displayport cable and try to use this custom EDID profile. It worked for me.
For example (and hoping it will help others) here are the data you need to setup a custom profile for the Dell 2408WFP :
Descriptor #0 - Timing definition:
Mode = 1920 x 1200 @ 59,950Hz
Pixel Clock............. 154,00 MHz Non-Interlaced
Horizontal Vertical
Active.................. 1920 pixels 1200 lines
Front Porch............. 48 pixels 3 lines
Sync Width.............. 32 pixels 6 lines
Back Porch.............. 80 pixels 26 lines
Blanking................ 160 pixels 35 lines
Total................... 2080 pixels 1235 lines
Scan Rate............... 74,038 kHz 59,950 Hz
Image Size.............. 519 mm 324 mm
Border.................. 0 pixels 0 lines
Sync: Digital separate with
* Negative vertical polarity
* Positive horizontal polarity
2) Of course, you can call Dell and tell them about it. They are sending me a THIRD replacement monitor for this. Be prepared when you call them : I spoke with two representative (and among them a "senior technician") who DIDN'T know what was a Displayport. They even tried to sell me the idea that 640x480 is the native resolution for Displayport. It was hilarious. Really. I got them to look it up on Wikipedia.
Case solved. Apple 1 - Dell 0.
P. -
I'm trying to plug a second monitor into my MacBook (13" aluminium - the MB version, not the MBP). The monitor is a 19" Iiyama, model PLE1900. I'm plugging in by DVI (DVI-D), using a Mini DisplayPort converter. The video on this laptop model is a NVIDIA GeForce 9400M.
When I plug in the monitor and turn it on, it just says "No Signal", but if I perform "Detect Displays" in the preferences, the monitor is detected, and even identified correctly.
So... I'm just stumped. Why would the lappy detect the display and then the monitor say "nothing here!"?
Is the problem due to DVI-D? The monitor also has a VGA (D-Sub) input, should I get a Mini DisplayPort adapter and try that? Obviously that an expense, so I'd rather not if I can help it.
Thanks for any replies.
Ben.Ok,
It was neither the cable nor the computer (thanks Apple). It was the monitor's EDID profile. Dell's problem.
There's two ways to fix this. 1) It is possible (I did it) to create a custom profile using SwitchResX. You'll need to hook up your computer to the monitor using a working connexion (I used DVI) and then use the "export" function in SwitchResX. It will give you a text file. In it you'll have enough data to fill SwitchResX' form to setup a custom profile. You'll then need to restart the computer, hook it with the Displayport cable and try to use this custom EDID profile. It worked for me.
For example (and hoping it will help others) here are the data you need to setup a custom profile for the Dell 2408WFP :
Descriptor #0 - Timing definition:
Mode = 1920 x 1200 @ 59,950Hz
Pixel Clock............. 154,00 MHz Non-Interlaced
Horizontal Vertical
Active.................. 1920 pixels 1200 lines
Front Porch............. 48 pixels 3 lines
Sync Width.............. 32 pixels 6 lines
Back Porch.............. 80 pixels 26 lines
Blanking................ 160 pixels 35 lines
Total................... 2080 pixels 1235 lines
Scan Rate............... 74,038 kHz 59,950 Hz
Image Size.............. 519 mm 324 mm
Border.................. 0 pixels 0 lines
Sync: Digital separate with
* Negative vertical polarity
* Positive horizontal polarity
2) Of course, you can call Dell and tell them about it. They are sending me a THIRD replacement monitor for this. Be prepared when you call them : I spoke with two representative (and among them a "senior technician") who DIDN'T know what was a Displayport. They even tried to sell me the idea that 640x480 is the native resolution for Displayport. It was hilarious. Really. I got them to look it up on Wikipedia.
Case solved. Apple 1 - Dell 0.
P. -
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[t431s] Code 28 in Device Manager for all external storage.
I'm using Windows 8.1 on a t431s. I'm having this problem where none of my external storage is being recognized. Under "Device Manager" any sort of external storage I plug in ends up under "Other devices". When I click on the device, I get Code 28 "The drivers for this device are not installed." Trying to update the driver brings me nowhere. The devices don't appear under disk management.
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Updated the BIOS.
Used Lenovo's SCCM package for Windows 8.1
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Solved!
Go to Solution.Hi, Buggy
After doing a bit of research. It seems your not the only one with this issue. WD has had this issue with even Windows 7 since 2012 with other Passport models.
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IT Specialist and Consultant
Lenovo Tablet Evangelist
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