I don't find any schematics for this unit, will check again but it's quite old.
I don't understand how this power transistor is supposed to work.
Epagec
Member
Last Activity: 04-21-2025, 06:33 AM
Joined: 03-18-2023
Location: Noisy Le Grand
-
Markings are
S9712
BCP51
Top pin and middle pins are both 0,2v 2 pins down on both sides are 18,5V, no shorts when coil removed...Leave a comment:
-
Compaq Armada 7730MT
Hello everyone
I have this compaq Armada 7730Mt (pentium 166. Mhz 1mmx laptop)
It's working well except pccard slot not working and fan not spining.
I have a short on what I suspect to be a 12v rail (related to the fan)
As you can see I removed the coil, it's ok no short on upper side but I have only 0,2V and the down side is shorted
When I inject I have 3amps at 1V but nothing going hot with thermal cam.
Do someone knows this board and could tell me which voltage rail it is (and what it's used for)
I don't... -
I have tried to find Something burnt but nothing is obviously burnt.
There is no short on the rail, I inject 12v from the atx pin and there is no consumption, I don't get the 12v on pcie and fan connector.
I have tried to inject 12v from the pcie port and fan connector and no shorts.
I have no continuity between atx port and pcie and fan port.
I don't have the boardview but I've seen on other models that pcie 12v and Fan connector are directly coming from the psu 12v connector.
I can conclued that there is a broken track between them.
Do you think that I can...Leave a comment:
-
Re: Asrock H81M-ITX no 12V
The graphic card is dead, it broke the MB, I have another one known good.
I will test all pins but I can tell that the firsts pins for 12V are 0v
What is strange is that it smells like burnt but I can't find where
I uploaded the picturof power con and pcie...Last edited by Epagec; 11-14-2023, 11:48 AM.Leave a comment:
-
Re: Asrock H81M-ITX no 12V
Voltage is very low on pcie connector and fan connectors (0,2v), diode mode to ground is 0.547Leave a comment:
-
Asrock h81m-itx
Dear All,
Thank you in advance if you can send the schematic of this MB :
Asrock H81M-ITX
REF IS 80-MXGPN0-A1A04
Regards -
Asrock H81M-ITX no 12V
Hello,
I have this MB that was working correctly
- Asrock H81M-ITX (Micro ITX with Core i5-4460)
I have tried another PCIe Graphic card to check if working and something burnt after 2 minutes...
Now the PCIe port is not working, CPU_FAN and CHA_FAN are not working neither.
PC can start and work with the in CPU integrated GPU, I have tried with antoher PSU but it's not the PSU
Also the 12V monitoring on bios says 'N/A'
I can't see the burnt component and I don't have so much skills on desktop motherboards,... -
Asus ROG R551JW - MB R2.0
Hello everyone,
I'm a perfect newbie in troubleshouting electronics but i'm trying to improve myself, please also forgive me my poor english (I'm french).
I have a Asus ROG R551JW-DM222H that is not working :
- You will find below the specs of the computer and links to boardviews related (it's aproximated as some components are not present due to different version)
it's a :
I5 4200H
Nvidia N16P-GX-A2
PCH SR17E intel haswel HM86
ITE 8585E
- You will also find the values i found WHEN checking the board with my multimeter...Last edited by Vesko356; 05-11-2023, 02:06 PM. Reason: Attached boardview removed and replaced with link! -
Re: New Members - please post your introductions here
Hello everyone,
I'm from France and I'm trying to learn how to repair laptop computers.
There is a lot of ressources on this forum
Best regards and thank you for all the work done !Leave a comment:
No activity results to display
Leave a comment: