CasasElectronics
Member
Last Activity: 03-25-2025, 04:59 PM
Joined: 03-30-2019
Location: Cabra
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I have searched over internet and did not find anything about the machine. Is that model correct? Who is the vendor? Acer? HP? -
Hi applejuice.
Try to inject low voltage on low resistance lines (the ones differing from good board), If you can touch anything hot, the problem may be from that side.Leave a comment:
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Acer 6920G with strange error - sometimes boots and sometimes not, and rare fan noise
Hi, I've been troubleshooting this PC for a while but I cannot repair it for now.
The error on this PC was the known graphics card soldering problem (or that was what I was thinking), so I took a 3470 from a 5920G and installed it.
The video after that worked, so I thought the problem was solved. When I tried to install windows, I noticed a problem: the ACER logo (bios load) stopped after completing the loading bar (and that was in every power on, but sometimes not even charged the Acer logo screen, I only could see a blinking white bar).
So I thought it may be... -
Thanks!!!!!!Leave a comment:
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MSI G2412 won't power on ZD7002 shorted
Hi!
I've been troubleshooting this monitor and found zener diode ZD7002 shorted.
I cannot find reference for replacement, and also not the schematic.
The MB model is 715GB752-M0A-T01-005I
Thanks in advance.
Fran Casas.... -
Hi.
Can you see something wrong?
Thanks!!Leave a comment:
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Hi mc, I have the tension and resistance values.
Red: measured in standby
Orange: measured after pressing ON. stays for 15s, then the voltage is the measured in red again
White: references
Yellow: resistance to GND
Thanks in advance....Leave a comment:
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Hi mcplsg, sorry for the description. I don't have the laptop here, but I will try to answer.
Measure resistance to GND on all coils
-Measured, i forgot to make a voltage map for troubleshooting, but I remember no short present.
Measure voltage to Ground on all coils
-Processor and RAM didn't have any voltage. I will measure all when I have the laptop again.
01.Before pressing button
02.After pressing button
RSMRST# present?​
-Yes, RSMRST# is present after pressing ON, but it drops to 0 after a determined time. Seems that it tries to start...Leave a comment:
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Acer Predator N17C1 Predator Helios 300
Hi! I have been troubleshooting this PC but at this point I am stopped.
MB: DH53F LA-F991P
Fail detected: Won't power on and NOT charging
Consumption analysis: At powering ON, consumption increases to 1-2mA, later it remains at 0mA.
Shorts check: No present
25Q64 memory with 3.3V: OK, when power on pushed
25Q64 memory read: not reading
ISL88739A: DC arrives OK, but not output at +12.6V_BATT with battery connected
Checking boot sequence:
[ATTACH=JSON]{"alt":"Click image for larger version Name:\timagen.png... -
Need Schematic HP 15 d006es
Hello, I need the schematic for the laptop of the title, i cannot find anything about it.
Motherboard model: OSAMU2_CR_HPC MV_MB_V1 010194G00-35K-G
Thanks a lot.Leave a comment:
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Re: X555LD i7 Processor Suspicious
Yes, that's what is getting hot.
I'll sell it for pieces.
Thanks a lot.Leave a comment:
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X555LD i7 Processor Suspicious
Hey!!
I've an ASUS X555LD motherboard with an i7 processor.
Yesterday, when i tested it the first time the processor went very hot, i had to disconnect it from the power supply.
I took back the heatsink, later I made another test, and I saw that the processor wasn't heating so much (i couldn't see that there was a small area of the proccesor that continued heating, which I saw later).
Hoping that the processor weren't the problem i continued exploring the motherboard. I thought that it could be a BIOS problem, so I looked for the VCC signal of the bios chip, and i didn't... -
Compaq CQ61-320SS
I need the BIOS for this laptop, it does nothing.
Thanks a lot. -
Re: Samsung NP300E5A-A05ES doesn't start
I've been investigating the lost voltage and i've found that there are 4 mosfet which have it's VGS=0V. I've also checked the RAM voltage obtaining 0.25V.
I've checked the mosfet controller and I've found that I've correct supply values on the controller (VR_ON, activation pin is 3.03V, VDD supply pin is at 5V, VCCP also is at 5V)
There are two pins on the controller called PGOODG and PGOOD which would be high for a good operation but the controller puts them at 0V, bescause i've cutted the track on the board, having 3V by the...Leave a comment:
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Re: Samsung NP300E5A-A05ES doesn't start
I have replaced the SPI memory an reprogrammed the BIOS with the .bin of this laptop and i have the same response, at start i have fan 100% working and any response, i don't have response in the screen and with a external monitor the same result.
Also I've tested the power comsumption and i have 0.2A at 19.2V, i think that the starting cannot be completed.
The processor doesn't get hot and the only response i have is the power off when i press the power off button.Last edited by CasasElectronics; 07-31-2019, 08:30 AM.Leave a comment:
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Re: Sony KDL37S5600 power error
With the whole tv I have the same response, it seems that the operating system is fully locked, and it doesn't respond to the remote signal.
I have thought two alternatives: or search for the NVM memory and replace it (I don't know where it is located, the component name) or search for a new motherboard.
What do you think?Leave a comment:
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Re: Sony KDL37S5600 power error
I've tried to enter the TT menu, because i've seen in the manual that i can enter the number 41 to restart the NVM, but i can't do that, i've pressed the three keys to enter the mode during 5 seconds and the red key 2 times before pressing 41, without having any response.
I've tested if the TV responds to the power off pulse of the remote control but it doesn't respond, and I think that the blocking status of it doesn't allow to enter that menu.
I also cannot see anything on the screen because i don't have the t-con.
Thanks a...Leave a comment:
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Sony KDL37S5600 power error
Hi, a friend has brought me the a sony kdl37s5600 motherboard, which has the problem of 5 pulses blinking red led. Thinking that the issue could be the power supply, I've tested the board with my supply, having the same response.
I've tested all the voltages(supply and dc-dc converters) and all are good at the beginning(because during the red led blinking the voltages disappear).
In my test conditions i dont have the tcon, so i'm testing the motherboard without it.
I've thought that the problem will be in my friend's tcon, because if this board has a test voltage which it's...Last edited by CasasElectronics; 06-27-2019, 10:19 AM. -
Re: Samsung NP300E5A-A05ES doesn't start
Ok, i will find out that to see if I can locate the problem.
I have seen a thread in Facebook of the same laptop with the same problem, which was solved replacing the SPI memory to a new one, and reprogramming it.Leave a comment:
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Re: Samsung NP300E5A-A05ES doesn't start
These are the voltages i have readed, i also have reprogrammed the BIOS having the same response. There are 3 voltages of 0 near the processor that I think they would be bigger:...Leave a comment:
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