After looking at the datasheet provided
i found enable pin is too low 1.4v (supposed to be above 2.3v)
Why is the enable pin low?
Who is supplying that signal?
can i cut this trace and feed it 3.2v?
s_henya
Badcaps Veteran
Last Activity: 09-28-2024, 03:21 PM
Joined: 01-24-2011
Location: Beer Sheva
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ASUS TP412FAC 5V Troubleshooting
Hi all,
Trying to save this cutie from going to the scrap.
[B]Brand[/B]: ASUS
[B]Model[/B]: TP412FA-EC378T
Laptop does not power on properly.
3.2vSTB is available.
5v isn't working
Seems like someone already tried playing with this board.
need datasheet for the below IC [B]LJ=7B[/B]
found 1 blown resistor 100-> 10Ohm
some resistors\ caps are missing around this chip.
Anyone can share schematics for this board or datasheet for the above IC?Hi all,
Trying to save this... -
Liteon PA-12617 dead (Lenovo ideacentre3)
Hi Guys,
Trying to save this PSU from going to the bin.
PSU was found dead:
1.. Main fuse blown
2. Main switching transistor shortes
3. rectifier bridge shorted
4. low ohm resistor blown
replaced all of the above (resistor was replaced with a. Thin wire since i don't know what was the original value)
Have 330v on main cap. But standby is still not right.
maybe the driver chip died?... -
Asus X302LA battery power on issue
Hey all,
very weird case,
When laptop is connected to charger, battery is charging and holding charge.
When connected to charger:Upon power on, laptop turns on then off then on again.
Without charger, upon power on, laptop is turning on then off and staying off. If i try to push again on power button it’s doing the exact same thing.
i ordered a new original battery (i doubt it’s really original but a very good copy) exactly same phenomena.
i upgraded the bios to 206 but no change.
Guess my MB is the problem, but what should i check?... -
Resolved by clearing PRAM
Option Command P R
it restored apple startup sounds and command R started working.
i erased the mac data partition and reinstalled Catalina.Leave a comment:
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Imac 2012 format
Hi guys,
Just found this old but nice IMac 2012.
current user had a password which i dont know.
i want to format it and do a clean IOS installation.
i tried command. + R after powering on but it didn’t do anything and IOS continued to load.
i tried the online recovery but it gave me denied icon after connecting to the Wifi.
is there any working method to format it?
guess i can take the long way of ordering the prying tools and format the hdd using another pc.
but i was hoping for another quicker solution.... -
For mosfet resistance test i usually use diode mode for voltage drop, think it would be more useful.
will check and reply back.Leave a comment:
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Dear Mon,
Thank you for always finding time to comment and suggest solutions!
in this case i think i was misunderstood.
The battery is charged, laptop is able to power on and work using only battery- normal so far.
If i disconnect the battery and power on using only power from the charger the laptop does not power on.
Measuring on the 3.3v coil i can see 0v but for split second it jumps to 3.3v and drops again.
Is this laptop supposed to power on only with battery connected (charger alone isn't enough)?
​Battery charging FETs...Leave a comment:
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Lenovo Yoga 500-15ISK several faults
Hi guys,
Anyone ever worked on this board before?
Few issues im trying to resolve:
1. Laptop will not power up without main battery connected (missing 3.3v line)- measuring on the 3.3v coil i can see 0v but for split second it jumps to 3.3v and drops again.
Is this laptop supposed to power on only with battery connected?
2. Battery voltage + line is getting 19v, for my experience 7.4v battery isn't meant to be charged with main line voltage- is this normal?
3. No display on laptop screen, if i disconnect the LVDC cable and connects... -
01g-p3-1313-kr schematic
Hi guys,
i want to challenge myself to fix this graphics card- I know it's low value :-)
01g-p3-1313-kr (GeForce 210)
found 1 blown fusible resistor R56 ( already removed)
1 shorted diode D5 (already removed)
and i suspect short on U2 (ic itself isn't shorted)
i would like to know substitute diode and look at the diagram of that circuit.... -
Looking into the dump i backup, the file is totally empty- wonder how it got erased...
i was able to find this version online, reprogramed externally and the GPU is back to life....Last edited by s_henya; 05-05-2024, 03:09 PM.Leave a comment:
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EVGA GTX750TI BIOS Request
Hi guys,
Got this EVGA GTX750TI 2GB GPU
MB Bios is beeping when GPU is connected.
When booting with onboard GPU, MB is booting but the GTX isn't showing in windows device manager.
I would like to reprogram the bios EVGA 750Ti 2GB non-6pin 82.07.55.00.50
I searched around but couldn't fins 256kb BIOS like mine.
Anyone can please assist?... -
Working!!!
Many thanks to you🙏...Leave a comment:
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Adding pics...
Leave a comment:
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TOSHIBA SATELLITE Radius 12 P20W-C-10D BIOS Password removal
Hi guys,
Need your help with clearing out BIOS Password.
Laptop model: TOSHIBA SATELLITE Radius 12 P20W-C-10D
P/N: PSPVVE-00300WTE
SN: YF069816S
Motherboard: H000095820
Thanks in advance!...Last edited by s_henya; 04-25-2024, 01:03 PM. -
***any recommendations on a riser card?***...Leave a comment:
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Evga Geforce GTX750TI beeping
Hi got this cute GPU,
PC is powering on, GPU is getting power ~40deg
Cmos speaker is beeping.
other cards working fine on this build
tested the card on 2 other builds- same beep
visual inspection didn’t reveal any issues or missing components.
any test points?... -
Bump
can anyone please share bios file for secondary bios 1mb?
i uploaded my bios in the previous message.
Thank you 🙏Leave a comment:
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Tried the BIOS provided but no change, board is having power for few seconds but not posting.
i just saw this board has one more bios chip.
from the sizes it seems different.
can someone please advise, which one is the main and what is the data stored on the second chip?...Leave a comment:
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