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Search: Posts Made By: momaka
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals Yesterday, 10:36 PM
Replies: 10
Views: 345
Posted By momaka
Re: Asus B250 mining motherboard component issue

Yes, that indeed confirms the BIOS is OK... or at least to a point.

Now, since you do get other numbers before the 58 with the RAM installed and yet another different number without RAM, that...
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals Yesterday, 09:44 PM
Replies: 17
Views: 569
Posted By momaka
Re: MS-6590 KT4 Ultra - short on vcore

I know you mentioned in post #10 that you did have a heatsink on the CPU, but did you actually use a socket 462 heatsink? And did you clamp it down?

Reason I ask is because if you used a regular...
Forum: Troubleshooting Power Supplies and Power Supply Design 04-11-2021, 11:05 PM
Replies: 9
Views: 193
Posted By momaka
Re: Apple 85W MagSafe Power Adapter - blown - help with components

Thanks!

Looks like your APFC circuit MOSFET has likely bit the dust. So replacing the burned resistors and the IC likely won't solve the problem.

First step would be to remove all components...
Forum: General Computer & Tech Discussion 04-11-2021, 10:40 PM
Replies: 70
Views: 2,330
Posted By momaka
Re: Repurposing a 2004 Athlon 64 system in 2021

:nod:
Nice PSUs indeed, but not impervious to bad caps. The old ones generally tend to do a little better and not suffer from bad caps as much, IME. However, the moment you get one bad Teapo, that...
Forum: Troubleshooting Game Consoles & Other Weird Devices 04-11-2021, 10:01 PM
Replies: 57
Views: 8,290
Posted By momaka
Re: Post your worthless and/or pointless repairs

:why:
If you have the time and don't feel like doing anything else... maybe not.
I have a ton of little projects like that piling up already. Luckily, most don't take much space. Keeps me from...
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 04-11-2021, 09:20 PM
Replies: 20
Views: 380
Posted By momaka
Re: Asrock 775Dual-VSTA needs capacitors

Oh, nice, I didn't know you had a YT channel. Cool video! :)

Well, it looks like your 8800 GT cards are using SMD caps, so that's probably another turn-off right there... not that you couldn't...
Forum: Troubleshooting Power Supplies and Power Supply Design 04-11-2021, 08:15 PM
Replies: 5
Views: 110
Posted By momaka
Re: cooler master rs-750 load problem

Ok, good to know. So it likely is the PSU, then.

Based on the pictures you provided, I see a lot of CapXon capacitors. Generally, CapXon does show signs when it goes bad (bulging, leaking, and...
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 04-11-2021, 08:08 PM
Replies: 9
Views: 224
Posted By momaka
Re: Installing a Cap in circuit,help

Hmmm... 2 Ohms resistance to ground across that cap is suspicious. You may have shorted that rail to ground when the holes were damaged. I suggest to test the video card in a motherboard that isn't...
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 04-11-2021, 07:58 PM
Replies: 40
Views: 3,445
Posted By momaka
Re: GTX 780tI Repair attempt...

Exactly!
"Blind" reflowing (without checking what the problem may be) is not the optimal troubleshooting to be done. If the card was obtained as non-working 2nd hand, first always check for missing...
Forum: Troubleshooting Power Supplies and Power Supply Design 04-11-2021, 07:51 PM
Replies: 18
Views: 286
Posted By momaka
Re: EVGA NEX650G power supply detecting a fault on startup.

I guess my online searching skills are no match. :) Thanks!

Now the question is if there's actually a published datasheet with the pinouts of that chip.


Well, have a look at the circuit...
Forum: Troubleshooting Power Supplies and Power Supply Design 04-11-2021, 03:01 AM
Replies: 18
Views: 286
Posted By momaka
Re: EVGA NEX650G power supply detecting a fault on startup.

True... but did you actually try seeing if you can find a datasheet for that IC? :) I tried looking up the numbers and I can't get anything meaningful. The "6601" in the name suggested HIP6601 at...
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 04-11-2021, 02:35 AM
Replies: 9
Views: 224
Posted By momaka
Re: Installing a Cap in circuit,help

The vias / holes for that cap look completely destroyed. Don't bother scraping off any more solder mask or going deeper into other layers - you could short something out.

Most likely, the easiest...
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 04-11-2021, 02:25 AM
Replies: 5
Views: 167
Posted By momaka
Re: GTX980 - GPU die KO?

No, but knowing how problematic the GTX980 cards are (well, all large-die, high-power GPUs are these days), I don't suggest spending too much effort on it. Good chance the GPU is probably toast too,...
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 04-11-2021, 01:38 AM
Replies: 20
Views: 380
Posted By momaka
Re: Asrock 775Dual-VSTA needs capacitors

+10

The two 8800 GT cards Dicky96 has from this thread (https://www.badcaps.net/forum/showthread.php?p=1033706#post1033706) should make nice donors if he has no plans for them. I think most...
Forum: Troubleshooting Power Supplies and Power Supply Design 04-10-2021, 11:51 PM
Replies: 9
Views: 193
Posted By momaka
Re: Apple 85W MagSafe Power Adapter - blown - help with components

Could we see a few pictures of the top-side of the adapter where the components are? That should help us determine what that MOSFET is doing. It's clearly on the primary side, as the presence of the...
Forum: Troubleshooting Power Supplies and Power Supply Design 04-10-2021, 11:37 PM
Replies: 6
Views: 89
Posted By momaka
Re: 80v charger blown caps .

Well, if that charger was indeed dropped a few times, those ceramic caps could have gotten cracked then and were just waiting for "the right moment" to short out and throw the sparks show.

I fixed...
Forum: Troubleshooting Power Supplies and Power Supply Design 04-10-2021, 11:24 PM
Replies: 12
Views: 354
Posted By momaka
Re: Cooler Master MWE Gold 650W (MPY-6501-AFAAG) randomly won't turn on

Not a whole lot, if at all. But probably the hold-up time will suffer even more.
390 uF is already quite a bit too small for a 650 Watt PSU. So going down a bit further just doesn't matter much at...
Forum: Troubleshooting Power Supplies and Power Supply Design 04-10-2021, 10:56 PM
Replies: 5
Views: 110
Posted By momaka
Re: cooler master rs-750 load problem

Can you post some pictures here of the internals of the power supply? That way we can see what you have.

Also, did you try your PC with another PSU and confirm the system can stay turned On under...
Forum: General Computer & Tech Discussion 04-09-2021, 09:55 PM
Replies: 4,896
Views: 821,491
Posted By momaka
Re: best cheap/free scores 1.1

:lol: :lol: :lol:

That's a hilarious comment!

I guess you could say I probably kind of do that too... at least with my CRT monitors for sure! :jester: :goofy: ... even moreso if anyone tries to...
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 04-09-2021, 09:23 PM
Replies: 40
Views: 3,445
Posted By momaka
Re: GTX 780tI Repair attempt...

Glad to hear you got your card working. :smile:

Keep in mind, though, that this is likely only a temporary fix. However, you may be able to extend that fix for quite a good amount if you keep the...
Forum: Troubleshooting Power Supplies and Power Supply Design 04-09-2021, 08:49 PM
Replies: 56
Views: 1,554
Posted By momaka
Re: 1300W PSU - Help with replacement mosfet

One is for enabling power to the PWM chip on the primary side when you short the PS-ON signal to ground (so the main PS can start.) The other is for sending feedback from the secondary side (from the...
Forum: Troubleshooting Computer Displays 04-08-2021, 11:28 PM
Replies: 8
Views: 352
Posted By momaka
Re: OSD pops up, LG Flatron W2361vjkj

Why would you assume that?
Chips like these almost never go bad, unless some external source massively damages them with a voltage spike... and in most cases, that's fatal to these chips and monitor...
Forum: General Computer & Tech Discussion 04-08-2021, 11:03 PM
Replies: 70
Views: 2,330
Posted By momaka
Re: Repurposing a 2004 Athlon 64 system in 2021

True.
Well, based on some of the socket 939 MSI boards I have around, their VRMs run pretty cool. If that 3500+ CPU is what the system's had all its life, then it probably never ran much past...
Forum: Troubleshooting Power Supplies and Power Supply Design 04-08-2021, 10:34 PM
Replies: 56
Views: 1,554
Posted By momaka
Re: 1300W PSU - Help with replacement mosfet

Like R_J noted above, they should appear like a diode on one side (the side that is connected to the secondary of the PSU) and open on the other (unless current is flowing through the diode side,...
Forum: General Computer & Tech Discussion 04-08-2021, 09:50 PM
Replies: 70
Views: 2,330
Posted By momaka
Re: Repurposing a 2004 Athlon 64 system in 2021

That's a lot of power burnin'. :D

My guess would be these systems are mostly sitting idle?? But even so, unless it's a Pentium II / Pentium 3, chances are it will eat at least 50-60 Watts in...
Showing results 1 to 25 of 500

 
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