dfear
Member
Last Activity: 09-05-2024, 01:55 PM
Joined: 03-09-2013
Location: Bristol
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The joystick button is on the main board.... -
I have taken many voltage readings on both original and replacement main boards and IR sensor boards.
Here are the results:
Voltage results are in pin order (1-5).
Original main board.
====================
Original IR Sensor
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STANDBY
--------------
Gnd
2.96
.223
.026 or .077
11.85
ON
---
Gnd
.0215
11.59
.0765
11.83
Replacement IR Sensor
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STANDBY
Gnd
2.84
...Leave a comment:
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I have tried 2 different IR sensor boards, each with 2 different main boards, and both sets of tests have very similar results....Leave a comment:
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I have tried new batteries. the button on the TV does work....Leave a comment:
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The two IR sensors have the same part number: 17LD186....Leave a comment:
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I have done that today. There is no change in voltage on any pin (of the is sensor connector board on the main board). I Have done the same test with two mains boards and two IR sensor boards. All tests result in no reaction from the remote control....Leave a comment:
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hitachi 75hl16t64u - not responding to remote control
I have a hitachi 75hl16t64u tv in for repair and it is driving me crazy.
It came in for a power issue which I have finally resolved by replacing the power supply.
The current issue is that the TV does not respond to the remote control. I have replaced the IR sensor board with a used one but the fault persists.
Anyone have a clue how to fix TV?
FYI: I have checked the remote work s by pointing it at my camera on my phone.... -
Thanks...Leave a comment:
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Re: Macbook Air A2337 Schematic & SilkScreen – 820-02016 Schematic & SilkScreen (Prov
Thanks for your hard work!...Leave a comment:
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Re: 820-01521 schematic
Thanks!!Leave a comment:
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HP Pavilion x360 - 14-ba104na - 3 long and 5 short caps lock code.
I have a "HP Pavilion x360 - 14-ba104na" in for repair. The caps lock flash 3 long and 5 short.
HP says this error means:
The red light blinks three times, and then five, short white light blinks (3 long red, 5 short white)
This condition indicates that the computer does not detect the processor (CPU).
Does this mean the CPU is dead or is there another cause for this fault? -
MSI GP62 6QF - powers on, keyboard and power button lights up, then switches off.
MSI GP62 6QF - powers on, keyboard and power button lights up, then switches off.
Motherboard is: MS-16J51 (i think).
Symptoms:
1) press power button: keyboard and power button leds light up.
a) nothing on the screen.
b) fans are not spinning.
c) no sounds.
2) after about 1 min 15 secs the laptop switches off.
Video of the issue: [URL="https://youtu.be/Q913lEgnYZ4"]https://youtu.be/Q913lEgnYZ4[/URL]
I have tried flashing the bios, which I download from:
[URL="https://www.badcaps.net/forum/showpost.php?p=892117&postcount=2"]here[/URL].... -
Re: Eeprom dump thread!
Thanks for this. It helped me fix a monitor.
...
Leave a comment:
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Re: HP ELITEBOOK X360 1040 G7 - "power-on authentication" problems.
I have included before and after dumps (using RC Unlocker and HP Unlocker)....Leave a comment:
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HP ELITEBOOK X360 1040 G7 - "power-on authentication" problems.
HP ELITEBOOK X360 1040 G7 - "power-on authentication" problems.
A customer dropped off a HP ELITEBOOK X360 1040 G7 with a "power-on authentication" problem.
Customer says he didn't set this up. Neither password or fingerprint works.
I have tried flashing:
1) JBIOS1UH2
with:
a) RCUnlocker (by RethoricalCheese). Didn't do anything, beacause the chip is 32MB in size.
b) HPUnlocker (by mazzif). Made a small change (changed: "00 00 00 00" to "FF FF FF FF".
result: "power-on... -
Lenovo Thinkpad X1 Yoga Gen 1 - weird issues
I am trying to fix a "LENOVO THINKPAD X1 YOGA TYPE 20FQ / 20FR" laptop.
It's a 1st gen X1 Yoga and it has a couple of strange issues. I think they are related to either:
1) damaged ME region in the firmware/BIOS.
2) The version of the ME firmware is too old.
The two issues I am having are:
1) The laptop will shutdown, but fails to power off the laptop. If the laptop is forced powered off, then it can ONLY turned on again if:
a) The charger is disconnected.
b) The reset button is pressed.
c) The power button... -
Re: HP 14-bf054sa - weird power button issue
Hi folks
I have repaired this motherboard.
*** This is a lesson for all of uses who fix motherboards, beginners and seasoned pros too.
The lesson:
Take detailed (clear & hi-res) photos before your start working on a motherboard. Take photos of not just the components/parts you are working on, but the area around it too.
The FIX:
"Simply" replace the missing components. See the attached photo. I was missing: 1x 100K 0402 resistor, 1x 110K 0402 resistor,...Leave a comment:
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Re: HP 14-bf054sa - weird power button issue
I presume so, I have checked the power button on continuity mode and the multimeter goes BEEEEP! (so I take it the "resistance goes to zero"?).
I will check tho....Leave a comment:
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HP 14-bf054sa - weird power button issue
- forum postHP 14-bf054sa
LA-F301P Rev 1.0
This laptop came in with a number of minor issues (Screen with black bar and battery that needs replacing). The laptop also had issues relating to salt (water/air) corrosion, having been used near the ocean.
The HDMI port, 2x usb ports and the SD card reader all needed replacement as they had been affected by salty air and only work intermittently. The HDMI port, 2x usb ports and the SD card reader have been replaced and have been checked for (obvious) shorts.
The laptop now fails to turn on (normally).... -
Sony Vaio SVF153A1YM - Dead, No Power!
A customer brought in a Sony Vaio SVF153A1YM and said the problem was: "battery not charging (discharges when charger plugged in)".
I have plugged in the charger and there are not lights on the laptop. The laptop does not turn on either.
Diagnosis so far:
1) 19.5V on the pins 1-3 (source) of PQ35, but nothing on pins 5-8 (drain),
3) Changed PQ35, but still no power on the DRAIN pins.
4) Replaced PQ35.
5) Checked PQ2A and PQ2B (which is one chip) and pins 1 & 6 are connected (shorted?)
...
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