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Search: Posts Made By: lewistech
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 05-29-2022, 01:14 PM
Replies: 3
Views: 283
Posted By lewistech
Re: XFX RX470 MOSFET driver IC identification *help*

Perfect! Thanks all! ��

Great link to the code also! ��
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 05-29-2022, 11:39 AM
Replies: 3
Views: 283
Posted By lewistech
XFX RX470 MOSFET driver IC identification *help*

Hi all

Trying to identify this mosfet driver ic on my XFX RX470 8gb. I don't have the schematics or boardview to assist. The markings on the IC are AZ1. See picture.

If anyone has the...
Forum: BIOS & Schematic Requests! 05-02-2022, 12:55 AM
Replies: 918
Views: 349,801
Posted By lewistech
Re: Graphics card Schematics and Boardviews

Looking for pdf schematics or similar for gtx 1650 aero itx 4g oc. This is the GDDR5 version.
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 04-30-2022, 09:16 AM
Replies: 2
Views: 398
Posted By lewistech
SKhynix H5GQ8H24MJR-R4C datasheet request.

Hi all.

Anyone have or can share the datasheet for SKhynix H5GQ8H24MJR-R4C GDDR.

Thanks
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 04-22-2022, 07:21 AM
Replies: 1
Views: 222
Posted By lewistech
R9 290 Missing PX_EN

Have an R9 290 I'm looking at. Seems I don't have a PX_EN. What should the voltage level typically be for this signal? What is required for the GPU to give this signal? Thanks
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 04-20-2022, 06:57 AM
Replies: 10
Views: 611
Posted By lewistech
Re: GTX 1660 BIOS Beep Error

Just to update this thread for anyone who may be interested. :why:

I reflowed the memory ICs and replaced the BIOS chip with a new flash. The card is now working! :bow:

Thanks to all for the...
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 03-12-2022, 05:17 AM
Replies: 10
Views: 611
Posted By lewistech
Re: GTX 1660 BIOS Beep Error

Thanks will have a look next time I get a chance. Going to wait for a 1.8v adapter for my programmer and have a look at re-flashing. It uses a Winbond W25Q80EW 1.8V flash memory chip.

Will...
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 03-12-2022, 05:15 AM
Replies: 10
Views: 611
Posted By lewistech
Re: GTX 1660 BIOS Beep Error

Thanks i may try this :beehive:
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 03-12-2022, 05:15 AM
Replies: 10
Views: 611
Posted By lewistech
Re: GTX 1660 BIOS Beep Error

Motherboard buzzer.
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 03-11-2022, 08:38 AM
Replies: 10
Views: 611
Posted By lewistech
Re: GTX 1660 BIOS Beep Error

Thanks. No broken caps. no shorts found in diode mode.

3.3v on PEX_RST goes through an AND gate ok. AND gate has a 1.8v Vcc and 1.8v output.

I have had an oscilloscope on the refclk +/- and...
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 03-11-2022, 05:49 AM
Replies: 10
Views: 611
Posted By lewistech
GTX 1660 BIOS Beep Error

Have a GTX 1660 SUPER VENTUS. When trying to boot its giving me a beep code error. I get 1 normal beep followed by 3 fast short beeps.

All voltages on the rails and resistances are correct. The...
Forum: BIOS & Schematic Requests! 03-10-2022, 09:09 AM
Replies: 2
Views: 347
Posted By lewistech
Re: Schematic Request HD7970

Thanks will give it a look!
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 02-16-2022, 09:41 AM
Replies: 2
Views: 343
Posted By lewistech
Re: UPi chip identification help uP1509p

Ah good idea. Thanks for the help!
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 02-16-2022, 04:24 AM
Replies: 2
Views: 343
Posted By lewistech
HD7970 UPi chip identification help uP1509p

Is there anyone out there that can help me identify and provide the data sheet for a UPi chip? uP1509p shown as U300 in the image. It's from a HD7970 GPU.

Thanks
Forum: BIOS & Schematic Requests! 02-15-2022, 10:40 AM
Replies: 2
Views: 347
Posted By lewistech
Schematic Request HD7970

Hi all

Does anyone have a schematic for R7970 TF 3GD5/OC BE or similar?

Thanks
Forum: BIOS & Schematic Requests! 01-26-2022, 05:57 AM
Replies: 4
Views: 643
Posted By lewistech
Thumbs up Re: ASUS Prime Z-390-A Schematic

Perfect! Thank you! Maybe I can get this board I'm looking at fixed now!
Forum: General Electronics Technical Discussion 01-14-2022, 10:20 AM
Replies: 3
Views: 445
Posted By lewistech
Re: SOT Identification

Ahh perfect! Thank you for helping out a newbie!
Forum: BIOS & Schematic Requests! 01-14-2022, 06:14 AM
Replies: 4
Views: 643
Posted By lewistech
ASUS Prime Z-390-A Schematic

Hi all

Anyone have the schematic for a ASUS Prime Z-390-A rev1.02

Thanks
Forum: General Electronics Technical Discussion 01-13-2022, 06:34 AM
Replies: 3
Views: 445
Posted By lewistech
SOT Identification markings are MXX H8

Hi all

Anyone able to help me identify this SOT package component. I cant find a definitive answer when trying to look it up online. I believe the markings are MXX H8

The component dimensions...
Forum: BIOS & Schematic Requests! 01-12-2022, 07:23 AM
Replies: 918
Views: 349,801
Posted By lewistech
Re: Graphics card Schematics and Boardviews

Hi all

Looking for any schematics and or board views for the following.

POWERCOLOR AMD RADEON HD 7950 3GB AX7950 3GBD5-2DHPP

Sapphire Radeon HD 7950 3GB GDDR5

Thanks
Forum: Announcements & Related News 01-12-2022, 05:03 AM
Replies: 30,539
Views: 3,361,336
Posted By lewistech
Re: New Members - please post your introductions here

Hi all :)

Fairly new to the whole "online community" forum posting experience.

10+ years in the industry. Mainly on the electrical side, industrial automation, PLCs and such. Although the...
Showing results 1 to 21 of 21

 
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