# Unable to receive display from USB C or Display Ports on Vector Quad

**URL:** <https://deeptalk.lambda.ai/t/unable-to-receive-display-from-usb-c-or-display-ports-on-vector-quad/4011>\
**Category:** Technical Help\
**Created:** [November 9, 2023, 11:27pm UTC](https://deeptalk.lambda.ai/t/unable-to-receive-display-from-usb-c-or-display-ports-on-vector-quad/4011 "2023-11-09T23:27:28Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![vms](https://sea1.discourse-cdn.com/flex019/user_avatar/deeptalk.lambda.ai/vms/32/645_2.png) [@vms](https://deeptalk.lambda.ai/u/vms)\
**Post date:** [November 9, 2023, 11:27pm UTC](https://deeptalk.lambda.ai/t/unable-to-receive-display-from-usb-c-or-display-ports-on-vector-quad/4011/1 "2023-11-09T23:27:28Z")

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Hi,

I have tried connecting both USB C and Display Ports (there seem to be 4 per GPU and so total of 16 in my case). I have also tried swapping the SW switch for VGA. The display does not connect.

 ![WhatsApp Image 2023-11-09 at 15.26.49](https://us1.discourse-cdn.com/flex019/uploads/deeptalk/original/1X/22a1a42bb4103ac34ab5b20b45e46596de6a42f7.jpeg)

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<div class="post-metadata">

**Author:** ![markd](https://avatars.discourse-cdn.com/v4/letter/m/839c29/32.png) [@markd](https://deeptalk.lambda.ai/u/markd)\
**Post date:** [November 27, 2023, 4:04pm UTC](https://deeptalk.lambda.ai/t/unable-to-receive-display-from-usb-c-or-display-ports-on-vector-quad/4011/2 "2023-11-27T16:04:52Z")

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There is not a USB-C on these GPUs, so you are likely just connecting to motherboard USB-C used for normal USB data.

Do you see the BIOS on the screen while it boots? Or does it only go blank after the OS gets started?

General Issues:

1. Cable Issues (try a known working cable)
2. Wrong setting/interface on Monitor
3. Monitor may not be supported (try a different monitor)
4. Cable converters and extenders add extra points of failure.
5. Try a different GPU

Recently there have been issues with BAR memory where the OS cannot allocate.  
So on Desktops enabling the ‘SR-IOV’ and booting with a kernel parameter of ‘pci=realloc=off’ it can affect GPUs or other devices.

> <https://github.com/markwdalton/lambdalabs/blob/main/documentation/motherboards/ASUS-WRX80E/missing-USB-or-drives.md>

Power down, remove power and make sure the VGA switch is off, and IPMI/BMC switches are on (not half way on/off). The manual does state to remove the power plug. ([https://github.com/markwdalton/lambdalabs/blob/main/documentation/motherboards/ASUS-WRX80E/display-issues.md](https://github.com/markwdalton/lambdalabs/blob/main/documentation/motherboards/ASUS-WRX80E/display-issues.md) has a image and instructions).  
Then power up.

And resetting the CMOS, there is a button at the top of the back I/O ports, above the WIFI connectors to clear the CMOS.  
This is a WRX80E from the picture.  
[Pro WS WRX80E-SAGE SE WIFI｜Motherboards｜ASUS USA](https://www.asus.com/us/motherboards-components/motherboards/workstation/pro-ws-wrx80e-sage-se-wifi/)  
manual: [https://dlcdnets.asus.com/pub/ASUS/mb/SocketTRX4/Pro\_WS\_WRX80E-SAGE\_SE\_WIFI/E19401\_Pro\_WS\_WRX80E-SAGE\_SE\_WIFI\_UM\_V2\_WEB.pdf](https://dlcdnets.asus.com/pub/ASUS/mb/SocketTRX4/Pro_WS_WRX80E-SAGE_SE_WIFI/E19401_Pro_WS_WRX80E-SAGE_SE_WIFI_UM_V2_WEB.pdf)