Hi,
i had a HP 640 G8 with a DA0X8AMB8E0 Board. I would Flash the BIOS, but i used a CH341A Programmer with 5V instead auf 3,3. Then I thought the BIOS was now defective. I have already replaced it with a new one (flashed the same BIOS).
With the new chip, the notebook has the same error. The charging port lights up once and then goes out again. The notebook does nothing more.
I iced the board with a cooling spray to possibly find a chip that gets hot or has a short circuit. Unfortunately, I didn't find any. I suspect a fuse might have blown. Does anyone...
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-
06-07-2024, 02:47 AM
-
I am still working on an Lenovo e14 AMD notebook with some problems. The laptop booted normally but had a ton of problems with the soldered ddr4 memory. I tried deactivating the memory via bios, but that didn't work.
As i have a matching donor here, I decided to change the module i suspect to be faulty and exchange it with one of the donors.
Did so, but now the laptop won't boot anymore.
Anyone here who already did that and can comfirn, that exchangeing one module alone would work? Or do I need to exchange all 4 of them to make it work?Today, 02:42 AM -
Hey guys, I'm new here and I'd like to say thanks for all the knowledge on this forum first of all.
I am learning electronics repair, been fixing GPUs and laptops mainly until now, and I'm slowly trying to fix desktop motherboards now.
I had a few successes until now, but I messed things up with one of my recent attempts, namely a Gigabyte H410M S2 with which I burned my test cpu.
I had identified a mosfet which was burned, removed it, cheched for shorts and I didn't find any.
When the new mosfet came, I put it on the board and checked for shorts again and didn't find any....Yesterday, 08:38 AM -
need schematics / repair manual for Asus F1605z motherboard X1403za Rev 2.2Yesterday, 06:23 AM
-
Hello team,
I'm back with another topic.
It's a 65C715 TCL tv with backlight issue.
But the problem is a bit strange.
When I took this tv from the marketplace backlight didn't work but picture was ok.
Back at home I checked with led tester if led are alive and I can find something different in term of voltage supply => nothing
Putting all back together the tv worked fine for weeks. => Contact issue??
Few moment later the tv has started to have backlight issue back, turning off and on worked sometimes and tv was working....Today, 02:24 AM -
I have a 5W lamp on 12Volts battery, I want it to be half as bright, so I will add a resistor. What resistor should I supply?
A = W = 5 = 0.416mA
_ _
V 12
R = V = 12 = 28.84 Ohms (R) this is resistance of lamp
_ _____
I 0.416
So I will add one resistor 28.84 Ohms
I will have 28.84 + 28.84 = 57.6 Ohms
Or 28.84 + 28.84 = 14.42 Ohms
I don't know if it will work in series or in parallel
voltage would be 6V and amp current mA = 0.208mA We divide everything by two
W= V * I...06-04-2024, 01:58 AM -
I got this MSI Modern 14 laptop from a friend and it is dead.
The model number is: MSI Modern 14 B11SB (MS-14D2)
He told me that this laptop suddenly died on its own.
No power indicator light. But there's a battery charging light. If I press the power button I notice the charger brick clicking so I suspect something is still going on with the laptop trying to boot.
I do have a multimeter check all resistance seems okay. The fuse is also not shorted.
5VALW is present.
3VALW is present.
The strange thing is 3VSUS and 5VSUS...Yesterday, 08:56 PM -
I started troubleshooting this Razer Blade 15 laptop DA560 motgerboard a while back, due to some shorted 19v, 5v, 1v power rails. I fixed some of components and think 19v rail is good, 5v rail is good, 3v is better but not all way i think, and 1v is still bad. At this point the diode reading on these rails are 19v - 0.032v , 5v - 0.167v, 3 - 0.63v and 1v - 0.005v .
When the rails when down, I went down different rabbit holes and seeing chips getting pretty warm on thermal but not blazing hot. Yet there were not any caps or any small components getting blazing hot. Example is EC chip,...06-06-2024, 11:35 AM -
Hello,
I have 2 laptops E14 and one E15 with the same problem: don't turn on (no led) I suspect the bios and I have buy an CH341A.
But now I need a new bios...
I give below the older bios, can you check it please, or give a valid version of BIOS?
I will be very grateful to you
At first, this is the numbs of a e14: 20TA-00EWFR
with a bios chip: Gigadevice GD25Q80
Motherboard: GE4B0/GE5B0 NM-D011
thanks...05-17-2024, 02:58 PM -
[SIZE=36px]Hi techies!
Please help me to find and grab [B]Asus ga503qs 404 or 409 versions[/B]. I will be very pleased. And I'm all ready to give something valuable for exchange!
Please help me out!
these links are already dead:[/SIZE]
[url]https://dlcdnets.asus.com/pub/ASUS/GamingNB/GA503QS/ASUS_GA503QS_409_BIOS_Update.exe[/url]
[url]https://dlcdnets.asus.com/pub/ASUS/GamingNB/GA503QS/GA503QSAS409.zip[/url]
[url]https://dlcdnets.asus.com/pub/ASUS/GamingNB/GA503QS/ASUS_GA503QS_404_BIOS_Update.exe[/url]
[url]https://dlcdnets.asus.com/pub/ASUS...Yesterday, 08:40 PM
-
I got this MSI Modern 14 laptop from a friend and it is dead.
The model number is: MSI Modern 14 B11SB (MS-14D2)
He told me that this laptop suddenly died on its own.
No power indicator light. But there's a battery charging light. If I press the power button I notice the charger brick clicking so I suspect something is still going on with the laptop trying to boot.
I do have a multimeter check all resistance seems okay. The fuse is also not shorted.
5VALW is present.
3VALW is present.
The strange thing is 3VSUS and 5VSUS...Yesterday, 08:56 PM -
Hello guys, can someone help me with an eMMC dump for a Sony KDL55W-955B TV, I tried to read the original memory with the RT809H but it shows me that it only has 1888MB even though it should have around 3.8GB. On a new memory it shows me 3776MB. From what I found on the Sony page, the following models could also be compatible:
KDL-65W955B, KDL-55W955B, KDL-60W855B, KDL-50W805B, KDL-42W705B, KDL-32W705B, KDL-48W605B, KDL-40W605B, KDL-60W605B, KDL-55W805B, KDL-42W805B, KDL-48W585B, KDL-32W706B, KDL-42W706B, KDL-42W815B, KDL-42W817B, KDL-50W815B, KDL-55W815B, KDL-42W828B, KDL-42W829B,...Yesterday, 04:13 PM -
[SIZE=36px]Hi techies!
Please help me to find and grab [B]Asus ga503qs 404 or 409 versions[/B]. I will be very pleased. And I'm all ready to give something valuable for exchange!
Please help me out!
these links are already dead:[/SIZE]
[url]https://dlcdnets.asus.com/pub/ASUS/GamingNB/GA503QS/ASUS_GA503QS_409_BIOS_Update.exe[/url]
[url]https://dlcdnets.asus.com/pub/ASUS/GamingNB/GA503QS/GA503QSAS409.zip[/url]
[url]https://dlcdnets.asus.com/pub/ASUS/GamingNB/GA503QS/ASUS_GA503QS_404_BIOS_Update.exe[/url]
[url]https://dlcdnets.asus.com/pub/ASUS...Yesterday, 08:40 PM -
I am still working on an Lenovo e14 AMD notebook with some problems. The laptop booted normally but had a ton of problems with the soldered ddr4 memory. I tried deactivating the memory via bios, but that didn't work.
As i have a matching donor here, I decided to change the module i suspect to be faulty and exchange it with one of the donors.
Did so, but now the laptop won't boot anymore.
Anyone here who already did that and can comfirn, that exchangeing one module alone would work? Or do I need to exchange all 4 of them to make it work?Today, 02:42 AM -
Hello team,
I'm back with another topic.
It's a 65C715 TCL tv with backlight issue.
But the problem is a bit strange.
When I took this tv from the marketplace backlight didn't work but picture was ok.
Back at home I checked with led tester if led are alive and I can find something different in term of voltage supply => nothing
Putting all back together the tv worked fine for weeks. => Contact issue??
Few moment later the tv has started to have backlight issue back, turning off and on worked sometimes and tv was working....Today, 02:24 AM -
[B]request all to send me working bin file Lenovo L13 gen 4 bios 64 MB one[/B]
[B]request all to send me working bin file Lenovo L13 gen 4 bios 64 MB one[/B]
Yesterday, 12:55 AM -
Hello
SOUTHPEAK15 TGL MB 8L 19819-1
please clean bios thanks
backup
[ATTACH]288861[/ATTACH]...02-08-2023, 09:02 AM -
Please share the diagram and boardview for this model
Yesterday, 03:09 PM -
I have this 1707 with the 5V 0A power loop issue on 3 of the jacks.
One of the CD3215C00 had corrosion under one side U3100 to be precise.
This USB jack was drawing ~.2A and not boot looping.
After replacing the CD3215 I am having an odd problem. I can rotate the USB-C and it only works in one orientation. And now it boot cycles, like the other usb channels so I'm part way there.
After looking at the schematic and board view. It makes very little sense that this is happening since they both pin 59 and pin 60 both go to the same places on J3300.
...06-06-2024, 08:02 PM -
Lenovo IdeaPad Gaming 3 16IAH7 Compal HLG10 LA-L911P Rev 1.0 BoardView [ATTACH]n3286784[/ATTACH]...Yesterday, 09:48 PM