hello guys i do not usually repair macbooks and i need help.. i have macbook 820-01041-a a1990 20v present on charger and it has 3.3v on the coil but the 5 coil isnot present.. does macbook board is similars to other boards ?? 3.3v coil =3kohms 5v coil = 900ohms,, 0.10amps on dc power supply any help is highly appreciated
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Hi, I have a couple of AM4 b350 motherboard to fix .... I try to see what I got without installing anything (no memory, no cpu) and give them just 5V standby .... and I have a coil getting warm on both board near memory (1,2v on one, 1,35 on the second one). Is this somehow normal? Because It looks very strange to me.
And can't identify anything else getting particularly hot who can be the sink for this current ...
TIA07-02-2024, 02:06 AM -
hi i have this laptop IdeaPad 3 15ABA7 this is the boardview https://www.badcaps.net/forum/troubl...90#post3740490
nm-e531 i tried all kinds of bios editing and it doesn't work. it doesn't have schematic but it has boardview with board ID details in it.
maybe you could help me how to shift these resistors to disable its onboard ram.
this is is the presents and not presents... -
I have a laptop HP Victus 15-fb with motherboard DAG3PRMB8D0, CPU Ryzen 7535HS, and GPU RTX 2050. The laptop has a power issue: it does not turn on at all, and there is no light on the DC jack.
After inspection, I found that an NMOS near the charger input had a short. I replaced it, but the short remained on the 19V line. I checked the charging circuit and it was fine, but the short appears after the current sense resistor near the charger. The charger does not pass current when connected, so I inject 3V–4V after the sense resistor. No component gets hot, except the CPU which becomes... -
I have old game console which have connected to 220v outlet by previous owner and It is not able to turn on.
I checked continuity of fuse in PSU unit with a multimeter which is shown in the below picture with a orange circle around it, and It seems that fuse became open circuit.
I also found that as well as bulging capacitor, there is unidentified coil which has residue all over its surface
unidentified coil which has residue all over its surface
I want to replace this round black fuse and unidentified coil if it got broken.
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Back in 2020 i bought a (2nd hand) compact ATX psu to replace my current one. My PC case only fits very short ATX power supplies so i didn't really have the choice of buying a decent 80Plus unit. The current unit is a modded YoungYear unit that i made a thread about a while ago:
A "nice" YoungYear unit? - Badcaps
The "new" unit is a KDM-M6480 480W psu, the 480W number is a typical KDM bullshit claim of course, but the 24A rating on the 12V rail seemed reasonable and the "Active PFC" claim gave me a bit of hope that this was going to be decent-ish....