Dell Latitude 5590 ST FH1MNQ2
DDM80 LA-F411P REV 1
pwb mp3pg rev A00
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-
05-20-2024, 04:37 AM
-
Hello. I have problem with Dell psu, outputs are ok but it does not give power ok signal.
It has a secondady board with wt7527s to check inputs. It doesn't give PGO because it doesn't take enough PGI.
It takes PGI from a voltage divider.
I draw a schematic for you to understand.
My first question is why 5v use two transformer pins, while 12v uses only one.
My second question, is pin 2 in transformer weak? After resistor, diode and voltage divider, result is 0.7v instead of 1.2v, so wt7527s does not output PGO....05-20-2024, 07:33 AM -
hello, help me find the bios for DELL Dell Alienware m16 R1 MB ( 213260-1 INFINITY RPL-HX+NV-P )
ST H747LS3
those on the forum do not work...Today, 01:08 AM -
Please help with bios repair of Lenovo ThinkCentre M70t Gen 3 corrupt bios. Pc gives beep without ram but no display with ram. Ram and processor are ok. If possible, add DMI information to new bios.
Lenovo ThinkCentre M70t Gen 3 (12th gen)
Machine type: 11XE
Serial Number: PC2G4T4S
Motherboard: I670MS...05-30-2024, 06:34 AM -
Hello, I've been googling for some pointers on this but couldn't find anything that applies to this board. I have an Acer A315-22 (board NB8607) with faulty RAM between 142 and 174mb. I just wanted to disable the onboard RAM altogether, but this one doesn't seem to have any memory down ID resistors or strap in order to disable it. I'm attaching the schematic I found, the boardview for it also seems to be available somewhere in this forum but I still don't have a use for it lol.
How would I disable the RAM on this PC? Thanks for the help.
[B][MOD EDIT] LINK to boardview + schematic[/B]...06-02-2024, 11:26 AM -
I have Asus Z170 Pro Gaming motherboard, it's working fine apart from the reset and shutdown commands. It doesn't restart when exit the bios or choose to restart in the operating system. Shut down also doesn't work, everything works normally until the moment it should turn off. The only way to turn off is by keep pressing power button for a few seconds. What could it be? This would be my first motherboard repairToday, 12:57 AM
-
Guys I have set top box which has no power on in specific case. When I insert antenna plug which has 12V on it because of dB gain device on top of antenna, device if its turned off, it will not turn on.
After I need to open the case and short + and - on ABS10 chip and after that device will turn on, without antenna plugged in, after its turned on I can plug in antenna and it will work fine, but I notice there is some extra heat inside the unit.
Is this chip okay? Rectifier bridge ABS10 JQC I don't think there should be connection like additional diode between plus and minus...06-02-2024, 03:09 AM -
HI
I have a HP 15s-eq1096AU with a failed bios
I found a HP exe that allowed me to pull the bin and i entered my key in @8000-8030 & serial @00-FF
This booted to a screen saying clearing bios block 0-630 then restarted to blinking caplocks key reporting broken bios again
If anyone could make me a bios with the DMA info etc from this dump that would be greatly appreciated...Yesterday, 11:39 PM -
I have got an Steeldigi Steelshock 4 v2 controller won't draw any amp from outlet.
I have disassembled and removed the battery. I have tied to measure some points. The usb connector shows 5 volts. There are test points and shows 5 volts everywhere it should. The battery connector in diode mode shows 0.009v is it ok?
There is an U4 chip place, but no chip, between the battery connector and the charging port.
How should I progress to identify the problem?
Can anyone help me with this?...Yesterday, 11:20 PM -
Hi
I could´nt find boardview of x299 MS-7A95 V1.1 . Found some missing components and replaced them but there are still some resistors or caps missing...
thxYesterday, 10:45 PM
-
hello, help me find the bios for DELL Dell Alienware m16 R1 MB ( 213260-1 INFINITY RPL-HX+NV-P )
ST H747LS3
those on the forum do not work...Today, 01:08 AM -
I have Asus Z170 Pro Gaming motherboard, it's working fine apart from the reset and shutdown commands. It doesn't restart when exit the bios or choose to restart in the operating system. Shut down also doesn't work, everything works normally until the moment it should turn off. The only way to turn off is by keep pressing power button for a few seconds. What could it be? This would be my first motherboard repairToday, 12:57 AM
-
HI
I have a HP 15s-eq1096AU with a failed bios
I found a HP exe that allowed me to pull the bin and i entered my key in @8000-8030 & serial @00-FF
This booted to a screen saying clearing bios block 0-630 then restarted to blinking caplocks key reporting broken bios again
If anyone could make me a bios with the DMA info etc from this dump that would be greatly appreciated...Yesterday, 11:39 PM -
I have got an Steeldigi Steelshock 4 v2 controller won't draw any amp from outlet.
I have disassembled and removed the battery. I have tied to measure some points. The usb connector shows 5 volts. There are test points and shows 5 volts everywhere it should. The battery connector in diode mode shows 0.009v is it ok?
There is an U4 chip place, but no chip, between the battery connector and the charging port.
How should I progress to identify the problem?
Can anyone help me with this?...Yesterday, 11:20 PM -
Hi,
I have a bricked ThinkPad P52, has no display nothing. Just happened to be in this situation after a failed bios update. Could anyone please get the rom file? I just ordered the ch341a programmer for the first time so if anyone can help me that would be much appreciated.
Type 20m9-000kus
S/n pf-1ldn07 19/02
ThanksYesterday, 05:34 PM -
Hi
I could´nt find boardview of x299 MS-7A95 V1.1 . Found some missing components and replaced them but there are still some resistors or caps missing...
thxYesterday, 10:45 PM -
I get backlights that stay on not there is no image. The tv does not automatically power on when plugged in either which I generally see happen when there is a fault. It responds as it should to the power button.
I checked the test points on the TCON and I have proper voltages except for at 1P15V. I don't know if that is supposed to be 15V or 5V, but either way I only get 1.134V on that point. I have 12V, 8V, VCC, and a small amount on the CKV point.
I tried heating up the SoC on the main board but that made no difference. Disconnecting either ribbon from the TCON also...06-01-2024, 08:55 PM -
Guys I have set top box which has no power on in specific case. When I insert antenna plug which has 12V on it because of dB gain device on top of antenna, device if its turned off, it will not turn on.
After I need to open the case and short + and - on ABS10 chip and after that device will turn on, without antenna plugged in, after its turned on I can plug in antenna and it will work fine, but I notice there is some extra heat inside the unit.
Is this chip okay? Rectifier bridge ABS10 JQC I don't think there should be connection like additional diode between plus and minus...06-02-2024, 03:09 AM -
Hey everyone, I have an LG 65uq7050zud with a black picture but backlight is on. I tested the measurements from the PSU and they check out. I can’t find any service manual so I’m suspecting the main board. Any advice before I replace the board? Found them for around $60...06-02-2024, 12:10 PM
-
The HILTI CPC battery flashes green but no tool starts or works. when testing the battery has 19.2v what could be the problem with them because I have three similar ones but there is nothing written on them all the patches are removed in the first B22 /4.0 with 19.2v the second one B22 /5.2 with 21.8v the third B22 /4.0 with18.3v are all three destroyed ? a bit difficult to believe have also tried other Hilti tools the same thing if someone who can help very grateful...Yesterday, 08:05 AM