First post, by byte_76
I need some help please.
I have a Radeon HD3870x2 which is not detected by the PC. (Tested in multiple systems)
I removed the cooler and briefly started the PC while holding my fingers on both cores to confirm that both do get hot quite fast. On the rest of the board I cannot feel anything that is excessively hot with my fingers and I don't have a thermal camera to do a more thorough check.
With the card assembled, I booted into Linux and Windows using the onboard display adapter as primary and confirmed that the HD3870x2 is not detected at all. The cooling fan on the card does run and also seems to adjust it's speed slightly lower just after power on and otherwise the PC boots just fine but it seems entirely unaware that the graphics card is installed. (Again, tested on multiple systems)
I used a PCIe tester and confirmed that all lights are on. So the data lines seem to be okay.
I also confirmed that the LED's behind the power connectors turn on when the cables are disconnected and turn off when the cables are connected.
There is a bit of damage on the bottom rear corner of the card so it must have been dropped at some point but the damage seems to be fairly isolated and there does not seem to be many tracks in that corner.
I don't have much knowledge of electronics but I have a multimeter, LCR meter and hot air station.
I've not tried to measure any voltages while the PC is on (because the cores get hot too fast with the cooler off and when it's on I cannot access much) but since the cores do get hot, can I assume that all power stages are present?
Does anyone have a circuit diagram for this card?
What could be the issue?