Hello, this might be embarassing since I consider it a dumb question but keeps me kinda stuck sometimes in my journey.
I want to know if there is any post in this forum which explains my questions. [B]A)[/B] [B]When, where and how do I know when X voltage line is input or output. Example: [/B]
[URL=filedata/fetch?id=3266119&d=1715040463][ATTACH=JSON]{"alt":"Click image for larger version Name:\timage.png Views:\t0 Size:\t151.9 KB ID:\t3266119","data-align":"none","data-attachmentid":"3266119","data-size":"thumb"}[/ATTACH][/URL]...
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05-06-2024, 08:11 PM
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Hey guys, I have a Lenovo Ideapad 320-15ikb NM-B241 rev:1.0.
After turning it on, it runs for a few seconds then shuts off completely. No screen, no fan. After shutdown, a red light comes on and off fast. I've been trying to troubleshoot this for days now. It's never been opened up; the Lenovo sticker is still intact.
(!)I tried with a different BIOS battery, without any ribbon cables, on battery power, without the keyboard, and it's always the same.
Any insights on what might be causing this?...Today, 03:05 AM -
Hi guys,
A few days ago i asked a real hard question regarding plasma tv's but nobody could respond. I need to ask if anyone has replaced this IGBT with another type that actually worked.
The industry is awash with fake chinese knock offs.
I am so frustrated.
Kind Regards
A Anagnostou05-09-2024, 04:04 AM -
Hello all,
I have a Lenovo Think Station P700. I bought it second hand in order to use it as a server for home use for testing purposes.
It was running Windows 10 when purchased and I did an update and the BIOS stopped working. I took it to a repair shop and they couldn't find the BIOS for the P700 and told me they put the BIOS from the p500.
But at the moment the BIOS is missing Intel ME. It only shows Intel ME Firmware Version N/A. And current state is: it stuck at Lenovo logo.
I'm not a professional, but I have a CH341a and did a dump of the current BIOS.
...04-22-2024, 01:04 AM -
Board Number: LINDEN 6050A3147201-MB-A01 (A1)
ProdID: 8RN38AV
SN# 5CG1271K42
Build ID: 20WWLDDT601#SAK8#DAK8
I tried to remove the password, read BIOS with CH341A (3.3V fix) programmer. BIOS was read in NeoProgrammer 2.2.0.10. Dump data was read and checked 4 times (compared in HxD). Deleted data area 37000 to 37820 via Hxd. Flashing. At power on, the power LED is on and caps lock flickers 7 times. Flashed back dump BIOS and still the laptop does not turn on. I think the dump is corrupted. Please see how bad it is. (Pardon my English)...Today, 02:28 AM -
plaese remove entreprise management account from this chromebook asus...Yesterday, 06:22 PM
-
Dear forum,
I'm stuck with this old TV unit.
PSU: 17PW04-1
MB: 17MB62-1
Symptoms:
- Blue LED constantly blinking when connected to AC.
- Only sigh of life is beeping when touching the capactive buttons on the front.
Diagnostics so far:
Checked the PSU output voltages:
12V present
5V present altought its only around 4.2V
3V is present measured 3.4V.
I check TP 202 which is for the short circuit protection: 0.606V on diode mode
Since I met with some vestel models before with similiar symptoms...05-03-2024, 03:18 AM -
Hello guys, i am working on a X512FF motherboard that comes dead, 19V stops on first mosfet, Gate only have 3v... if a make a bypass laptops works great with no problem... already tested the 5 mosfets, if i remove the current sensor PRS8901, the 19v appear...
Something with the 19V line and the charger detects and stop working !
Any advices ?...05-09-2024, 08:30 AM -
Acer a315-54-588RCPU: SRFFX EH7LW la-h792p rev:1A bios need
Thanks all.Yesterday, 11:47 PM -
Can I ask you guys help me identify this godforsaken component?
I'm tearing my hair out finding this component.
The board is from an egg incubator.
i got it with a "popped cap" while there are many damaged components on it, which got succesfully identified with one exception:
[ATTACH=JSON]{"data-align":"none","data-size":"medium","data-attachmentid":3267072}[/ATTACH]
And here is the board where it came from (U1/1):
[ATTACH=JSON]{"data-align":"none","data-size":"medium","data-attachmentid":3267073}[/ATTACH]...05-08-2024, 08:21 AM
-
Acer a315-54-588RCPU: SRFFX EH7LW la-h792p rev:1A bios need
Thanks all.Yesterday, 11:47 PM -
Hi, i'm not that experienced much with voltage injection, I've had some laptops repaired using this method so please bare with me, I've got this laptop from a customer, the laptop doesn't turn on, no fan spin, no LED indications, no beeps nothing, after taking measurements,I found missing 19 rail after digging around I found that the bq chip was faulty which ive replaced with a known working one, then I found that two of the 4 n-mosfet qm1830 leading the 5v power rail were shorted which I also replaced,now the laptop got the 19v power rail, the 5 and 3v and 1 v rails restored, after checking...Yesterday, 09:14 PM
-
Hey guys, I have a Lenovo Ideapad 320-15ikb NM-B241 rev:1.0.
After turning it on, it runs for a few seconds then shuts off completely. No screen, no fan. After shutdown, a red light comes on and off fast. I've been trying to troubleshoot this for days now. It's never been opened up; the Lenovo sticker is still intact.
(!)I tried with a different BIOS battery, without any ribbon cables, on battery power, without the keyboard, and it's always the same.
Any insights on what might be causing this?...Today, 03:05 AM -
Board Number: LINDEN 6050A3147201-MB-A01 (A1)
ProdID: 8RN38AV
SN# 5CG1271K42
Build ID: 20WWLDDT601#SAK8#DAK8
I tried to remove the password, read BIOS with CH341A (3.3V fix) programmer. BIOS was read in NeoProgrammer 2.2.0.10. Dump data was read and checked 4 times (compared in HxD). Deleted data area 37000 to 37820 via Hxd. Flashing. At power on, the power LED is on and caps lock flickers 7 times. Flashed back dump BIOS and still the laptop does not turn on. I think the dump is corrupted. Please see how bad it is. (Pardon my English)...Today, 02:28 AM -
Please help me with bios for Asus A516K, no display fan spinning,
SN: MCN0CX34E058524
MB: x415ka R2.0
Model: A516K...Yesterday, 09:05 PM -
Hello, gentlmen!!!
My HP Probook 430 g2 does not detect battery. I tested the battery on another laptop and it is OK.
I believe smth is wrong with my PC ((.
Searching this forum I found some nice suggestions.
So, I tested Battery Connector pins (charger in/battery out) and here are my results:
pin_1 0v (-)
pin_2 3.30v
pin_3 0v
pin_4 3.38v (SCL)
[B]pin_5 2.55v (SDA)!!![/B]
pin_6 2.25 (+)
As far as I understand SDA pin must be ~3.3v???
Are there any other tests I can do before disassembling motherboard?
I...05-11-2024, 05:22 AM -
Hello guys
Because the unit is old (but only occasionally used) the loudness button causes some noise due to bad contact,
sprays did not work, so i decided to solder the pins that it connects on the pcb at the on (loudness on) position
i did that and it worked fine, i know from the bottom of my heart that the switch connects 2 pins and also d/c other 2 pins
on every position it have (6 pin switch), so i was curious what would happen if i clicked the switch off while the pins are soldered at on (so basiclly on and off at the same time), when i did so the sound is gone, nothing...05-05-2024, 06:20 AM -
Hi All,
Thanks for reading. Based on the interesting fact that the vertical lines issue don't seem to effect the menus whatsoever but rather everything around the menu regardless of video is shown, I'm trying to set mine whether the issue is the main board or the t-con board.
Again what's baffling is that the menu is not effected whatsoever. However, any other video displayed regardless of inputs or when no inputs exist exhibits the vertical lines and seem to effect black areas only.
The lines are green in color when the tv is in "Game Mode" and...Yesterday, 10:52 AM -
HI. I need help with this board! 5v/0a stable. Replacing the u7000 did not change the situation. Before I move on to replacing the SD3215, maybe there are some tips on what to pay attention
also need a diagram and boardview
[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"820-00840.png","data-attachmentid":3268566}[/ATTACH]...05-10-2024, 01:50 PM -
HI FOR ALL,
Dell XPS 15 9510
ST: fgnx2m3
board : GDP51/GDB51 LA-K411P REV:1.0
I'm trying to recover my corrupted BIOS dump, but ME Analyzer v1.96.4 r177 isn't identifying it as containing Intel Management Engine (ME) data. Could someone assist me with this issue?
or help me out to do recover my corrupted bios dump with extracted one from dell web site,
thanks in advance...Yesterday, 04:24 PM