1). Understand the schematic and check the connections between the EEProm and DSP
2). Check the functionality of the EEProm
I don't know if this is the unit's problem but it's a place to start.
I have little to no electronic experience...
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-
Hello, My head unit developed strange behaviors so I ran the built-in diagnostic package which returned "No EEProm". The service manual says there is no EEProm connected. I approached Pioneer and they said to swap out the DSP board. All said and good but the DSP board is $860 USD. I am hoping someone can help me
1). Understand the schematic and check the connections between the EEProm and DSP
2). Check the functionality of the EEProm
I don't know if this is the unit's problem but it's a place to start.
I have little to no electronic experience...04-08-2024, 05:32 PM -
Having this very weird issue.
The owner of this laptop complained about screen being intermittent when opening and closing, and has been using the laptop on a thunderbolt video connection since the screen failed.
I swapped with a working screen from an A2141 waiting for parts.
The Os exhibits this weird behavior where it boots to to 1/3 the status bar, then it makes the boop sound. It's at the log in but for whatever reason the desktop isn't loaded.
The laptop boots fine into recovery mode. I updated from Monterey to Sonoma and the laptop still has...04-27-2024, 01:37 PM -
Has anyone discovered if the M2 LCD works with the M3 board on the 16" I believe these are the same LCD? I know the M1 and M2 work on the 16" but does the 16" M3 LCD work with M2 LCD or M1? Curious if anyone has tried this yet?Today, 10:52 AM
-
Hello π I have a tv with these red lines. I've tried cleaning and re-seating the ribbon cables but no luck! Tried all 4 on the LJ92-01485 board and on the bottom of the panel. Do you guys think it's the board?|
[Edit] I don't know why the thumbnails aren't linking to the full images, but here is the gallery. [url]https://postimg.cc/gallery/WZcFzyf[/url]
[URL=https://postimg.cc/bZhnsDWs][/URL]
[URL=https://postimg.cc/BjBKDZfN][/URL]https://Hello π I have a tv with the...Tried all 4 on...Today, 04:22 PM -
Hello,
I read through this post:
[url]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-tvs-and-video-sources/88324-samsung-un49mu7000f-dead-no-power/page2[/url]
It seems like my tv is exhibiting similar symptoms. I have backlight when only the power supply is connected, but I didn't test much further.
The main board is slightly different (BN94-12402R) although it is stamped the exact same...
Board is stamped:
MODEL: KANT_M_BUILT_IN
CODE: BN41-02568B
MODEL: BN41-02568
I wonder...Today, 09:06 PM -
Is it posable to retrive a windows 10 key from a rebuilt computer?
I was told the hard drive has a bad section and needs to be replaced.βToday, 02:36 PM -
Hi All. I had a [B]Roland KR-3500 Digital Piano [/B](similar to the KR-4500) that exhibited a [B]Crackling audio sound on all keys[/B]. After reading somewhere about someone with a similar issue who had replaced all the Electrolytic caps I decided to also go down that route. [B](Spoiler : It worked ![/B]) After some basic troubleshooting I determined that it could be noise feeding thru from the Keyboard scanning since the Demo tunes played back undistorted and the Audio amp / speakers were fine ( Inserted an Audio signal into the rear Audio input). After extracting the main board from the shield,...Today, 08:20 PM
-
Hello,
Does anyone have the schematics for the backlight circuitry for the M15R5 Ryzen edition?
mainboard model: LA-K453Pβ
Your help is very much appreciatedToday, 07:59 PM -
can anyone help me remove panasonic CF-LV8SDDZTF
model CF-LV8SDDZTF
serial 2HKCC48561
borad number DHLB1434ZC/X1
β...Today, 06:02 PM -
Hi, have a HP workstation Z2 Mini 4G for repair with CPU vcore missing.
The resistance at the output of CPU vcore coils, is less than one ohm so I think CPU could be damaged, but no mosfet are damaged.
It mounts an i7 8th gen, and have only i5 7th gen for test, but I think it is not compatible.
Without CPU in the socket there is no short, but there is no vcore voltag, and it emits a beep like no detecting ram.
The controller chip for cpu vcore is a MP2949A, and has no enable voltage at pin 37.
I wonder which circuit generates this enable...04-22-2024, 12:35 PM
-
can anyone help me remove panasonic CF-LV8SDDZTF
model CF-LV8SDDZTF
serial 2HKCC48561
borad number DHLB1434ZC/X1
β...Today, 06:02 PM -
Hello,
I read through this post:
[url]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-tvs-and-video-sources/88324-samsung-un49mu7000f-dead-no-power/page2[/url]
It seems like my tv is exhibiting similar symptoms. I have backlight when only the power supply is connected, but I didn't test much further.
The main board is slightly different (BN94-12402R) although it is stamped the exact same...
Board is stamped:
MODEL: KANT_M_BUILT_IN
CODE: BN41-02568B
MODEL: BN41-02568
I wonder...Today, 09:06 PM -
Hello π I have a tv with these red lines. I've tried cleaning and re-seating the ribbon cables but no luck! Tried all 4 on the LJ92-01485 board and on the bottom of the panel. Do you guys think it's the board?|
[Edit] I don't know why the thumbnails aren't linking to the full images, but here is the gallery. [url]https://postimg.cc/gallery/WZcFzyf[/url]
[URL=https://postimg.cc/bZhnsDWs][/URL]
[URL=https://postimg.cc/BjBKDZfN][/URL]https://Hello π I have a tv with the...Tried all 4 on...Today, 04:22 PM -
Hi All. I had a [B]Roland KR-3500 Digital Piano [/B](similar to the KR-4500) that exhibited a [B]Crackling audio sound on all keys[/B]. After reading somewhere about someone with a similar issue who had replaced all the Electrolytic caps I decided to also go down that route. [B](Spoiler : It worked ![/B]) After some basic troubleshooting I determined that it could be noise feeding thru from the Keyboard scanning since the Demo tunes played back undistorted and the Audio amp / speakers were fine ( Inserted an Audio signal into the rear Audio input). After extracting the main board from the shield,...Today, 08:20 PM
-
Hello,
I've been working on this laptop for a few hours and I am stumped. Still learning this kind of troubleshooting. Hoping someone can help.
[U][B]Computer Information:[/B][/U]
Model: Lenovo IdeaPad Gaming 3 15ARH7
Motherboard model: NM-E211 Rev: 1.0
Schematic, Boardview, & FlexBV Free - Attached
[U][B]Problem:[/B][/U]
The computer does not charge the battery or power on also does not power on with power adapter only. Battery have no charge on it at all (reading mV on battery charge). When connecting the power adapter...Yesterday, 01:27 PM -
Hello,
Does anyone have the schematics for the backlight circuitry for the M15R5 Ryzen edition?
mainboard model: LA-K453Pβ
Your help is very much appreciatedToday, 07:59 PM -
Is it posable to retrive a windows 10 key from a rebuilt computer?
I was told the hard drive has a bad section and needs to be replaced.βToday, 02:36 PM -
Hello,
I have an HP 14-dq0055dx laptop here that came in for boot looping. It was previously taken to another shop and they tried flashing a BIOS firmware to the chip, so I cannot take an original dump. For a second or two, a message will come up on the screen that says:
This loop will go on for as long as you like. I let it run for about 12 hours and came in the following morning and it's still looping.
Motherboard model number: DA0PAMB46A1 REV: A
Secondary motherboard model number: 0PAB
SKU: 685K4UA
Attached is the latest...Today, 09:11 AM -
Hi,
i've got for repair Lenovo L340-15IRH fg541/fg741 nm-c362 rev 1.0, laptop have instant short 20v 0.20amp draw, lv5083a goes to 100degree, i've removed 1 shorted cap next to the IC and short still remain, from look of it short comes from legs 16-25, i can't find what this IC i believe is 3/5V regulator?
First mosfets normal 20v Source and drain and Gate 25v...Today, 11:43 AM -
Hey folks, I have this iPad Pro 12,9" 4Gen A2232 here with no charging issue. The main fault was a crossed pins / faulty USB charging port due a bad cable.
So I started to replace this parts:
- replaced usb-c port -> no result
- replaced battery -> no result
- replaced usb-c chip CD3217B12A -> no result
- replaced 343S00326 -> no result
- replaced 343S00327 -> no result
- replaced 343S00328 -> no result
I have no more ideas for this issue. There is no short on the whole board, and the iPad is working fine...Today, 05:37 AM