Help asrock fm2a55m- vg3 missing 3.3v on ram
Help asrock fm2a55m- vg3 missing 3.3v on ram
Always beeping ram problem
How can jumper the 3.3volts
Always beeping ram problem
How can jumper the 3.3volts
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Re: Help asrock fm2a55m- vg3 missing 3.3v on ram
That motherboard is DDR3 so Vram is 1.5V not 3.3V
There will be a VRM that generates Vram from some other supply, 5V, 3V or 12V
You need to find that supply, it will probably be near the RAM slots
If you cant' find the source of Vram just by lookihng, you can look up the pinout for DDR 3 sockets and trace it from there or you could trace it from the capacitors on DIMMs.
Bear in mind some of the capacitors on the DIMM will be connected to Vref (0.75V) not Vram and one end of all capacitors will go to ground. You could have a short on Vram to ground also
RichFollow me on YouTube
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Learn Electronics Repair
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Re: Help asrock fm2a55m- vg3 missing 3.3v on ram
There's still a 3.3V power rail going to the RAM to power the I2C ROM for SPD, but it should be directly connected to the main 3V rail.OpenBoardView — https://github.com/OpenBoardView/OpenBoardViewComment
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Re: Help asrock fm2a55m- vg3 missing 3.3v on ram
This should help
Asrock FM3A55M BoardviewFollow me on YouTube
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Learn Electronics Repair
https://www.youtube.com/channel/UCFX...R8UZ2vg/videosComment
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Board had no history of liquid; unsure of drop history, but no signs of damage of any kind worth noting.
Charger sitting at 5v/0a. PPBUS is at 1.9v-0.9v steady cycle (peaks, drains, loops). Confirmed CHGR_EN_MVR is missing, but DCIN was reaching ISL just fine, so replaced ISL--no change at all. Confirmed pp3v8_aon is also missing--and being unsure *exactly* which signal appears first (or if they are simultaneous), I inspected PMU/U8100 area and found no shorts, but also found PP3V8_AON_MPMU_ISNS_VIN missing (not shorted). Replaced U8100 just in case (have had them fail in weird ways),... -
Hi everyone,
I recently acquired this card from a seller who was selling a PowerMac G5 for parts. He mentioned that the video card was probably broken too.
Upon closer inspection, I can tell the reason why it won't work: it's missing a bunch of CAPS! (it's also missing an inductor - 1.0uH).
It's a nice card as it's one of the few AGP cards that will support 2560 x 1600 resolution on a PowerMac G5 using a 30" Cinema Display.
Looking at the card, it appears to be missing the following:
1x 1.0uH inductor - orange square
2x... -
Hello, I need help figuring out what chip came unattached from my motherboard (Asrock Z390 Taichi). I found a picture online of the chip. However I cannot find a boardview or a high resolution picture to identify what it was.
My assumption is that it is a buffer logic 74LVC1G125GW. judging by a Z270 Taichi boardview I found but not really a fan of smoke testing parts.
Any and all help is appreciated - Thanks
...03-24-2022, 08:17 PM -
Hey guys.
Need help with this one.
Fan not spinning due to missing PWN Fan signal.
Also 5 seconds from powering up it freezes, unless in BIOS.
But as soon as Windows starts to load, it will freeze.
CPU is COLD / Room temp when it freezes.
I've replaced the CPU, same problem.
Replaced SIO/KBC IT8987e and reprogrammed - same problem.
Replaced fan - same problem.
Replaced flex cable from board to daughterboard (which has fan connector on it) - same problem.
Checked the Thermal sensors around CPU and Board to the SIO/KBC and...08-19-2024, 05:22 PM -
Hello. I would need some advice please.
My son's MBP suddenly stopped working and is now only getting the green-then-orange light on Magsafe and no fan spin.
He brought the MBP into the house (22 deg C) from a very cold conservatory (-3 deg C) and turned it on straight away. The Mac suddenly died a few minutes later.
I examined the logic board and couldn't find any signs of water damage, corrosion, blown up components etc. Nothing was ever spilt on it, and the logic board looks immaculate.
I have already replaced the logic board with another...
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