Ok, im waiting for the parts, i plugged in GTX970 with one memory chip, 0,9V at GPU, 1,6V at GDDR, seems legit, isn't it? DVI socked deformed during baking, and i also dont have mini-HDMI cable, so I cant check if there is any image at the moment.
In the meantime i diagnosed Aerocool templarius 1150W PSU, There must have been flashover betweend rectifier bridges terminals and wire jumper placed 1mm or less from them. Maybe some dust with moisture from the air caused that, or maybe it was hit by thunder. Also PFC mosfets are broken, when tested with low voltage from DMM they seem ok, but when 320V is applied they cause shortage. Mosfet drivers and all resistors around them seem OK, I'm going to measure caps ESR and capacitance, just to be sure.
So im waiting for balls, stencil etc for GTX970, and mosfets and bridges for PSU.
Also repaired GTX550TI- there was blown/broken off SOT-23 n-mosfet in the external power supply sensing circuit.
There was also GTX580 in my closet, PC boots with it(display connected to integrated card), 1V at GPU, 1,57V at GDDR, 4.95V at +5V in DVI socket.
GPU core resistance 0.5ohm, GDDR over 20 ohms.
There was 3 ceramic caps missing- one exploded, and 2 were just broken off. I replaced all of them with same dimensions caps from other graphics card.
I guess CHL8266 is GPU VRM controller and APW7088 is GDDR VRM controller.
CHL8266 datasheet:
https://www.marutsu.co.jp/contents/shop/marutsu/ds/CHL8266_v1.05_10-12-11.pdfAPW7088 datasheet:
http://www.anpec.com.tw/ashx_prod_file.ashx?prod_id=643&file_path=20131217184206967.pdf&original_name=APW7088.pdfI think the controllers should send some kind of PWR_good signal, and its P_ok on APW7088, going to check that, but is there anything similar in CHL8266?
I've also read that these GPU-s tend to fail internally, maybe that is the case and there is no sense to investigate further?
Thanks for all of your help and knowledge!
And one more question, i saw ZXW dongle for mobile phones, there are many schematics/boardviews for laptops in the web, is there any tool/site to obtain desktop schematics? graphic cards, motherboards?