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m1ch43lzm replied to HP 17-cn0152ng part U201 Q300 broken

in Troubleshooting Laptops, Tablets, and Mobile Devices

Yesterday, 01:26 PM
Hi [USER="628692"]Harry2k1[/USER] [USER="295753"]mon2[/USER] , it looks to me like that white ribbon cable goes to a USB daughterboard on the left side from 1st picture on post #3, the keyboard connector is under the battery

Looks like it's a USB load switch, [USER="628692"]Harry2k1[/USER] can you post a clear picture of the ic near right side usb port? (circled in red, second picture), it might be similar IC
[ATTACH=JSON]{"data-align":"none","data-size":"thumb","data-attachmentid":3623329}[/ATTACH]...

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m1ch43lzm replied to HP VICTUS 15-fa1093dx Blown Power IC

in Troubleshooting Laptops, Tablets, and Mobile Devices

Yesterday, 11:18 AM
Hi
Is this IC near the CPU? I can't tell from the pictures
AT00 = AOZ5016QI

If that's the case, very likely CPU is dead

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m1ch43lzm replied to HP 15-eh1000 DAG7HAMB8F0 liquid damage

in Troubleshooting Laptops, Tablets, and Mobile Devices

09-14-2024, 08:24 PM
I have taken a picture of my board, could you compare with mine? Looks like a screwdriver slipped on your board [USER="555670"]Tomaty993[/USER]

EDIT: Just noticed the post date, last post was 2 months ago, I'm leaving the picture in case someone needs it
Board is from HP 15-eh0010la ( 15-eh0xxx ) with Ryzen 7 4700u CPUTomaty993

1 Photo

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m1ch43lzm replied to HP 15-eh1000 DAG7HAMB8F0 liquid damage

in Troubleshooting Laptops, Tablets, and Mobile Devices

09-14-2024, 11:59 AM
Hi [USER="555670"]Tomaty993[/USER]
Which part is damaged? i have the same working board DAG7HAMB8F0 REV.F. Can you draw a circle on the damaged part?Tomaty993Hi [USER="555670"]Tomaty993[/USER]
Which part is damaged? i have the same working board DAG7HAMB8F0 REV.F. Can you draw a circle on the damaged part?

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m1ch43lzm replied to Graphics card Schematics and Boardviews

in BIOS & Schematic Requests!

02-26-2023, 09:00 PM
Re: Graphics card Schematics and Boardviews

Hi, I'm looking for Gigabyte RTX 3080 Ti Gaming OC (GV-N308TGAMING OC-12GD) schematics and boardview

Thanks in advance

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m1ch43lzm replied to CH341a Serial Mode

in Equipment Usage, Soldering, Techniques, and Reviews

06-22-2021, 09:40 PM
Re: CH341a Serial Mode

Found this schematic
[url]https://www.onetransistor.eu/2017/08/ch341a-mini-programmer-schematic.html[/url]

It's from a different PCB, where the design (not sure if intentional or by mistake) outputs 5v levels, but the ZIF socket is powered with 3.3v , you can compare the schematics on that page

Make sure you also installed the correct drivers for serial mode (P/S jumper should be open for serial, closed for parallel), check also on Device Manager under Ports (COM & LPT), should be listed as "USB-SERIAL CH341A"...

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m1ch43lzm replied to HP DV6-2064CA will only power up if its off for about 5 to 10 minutes

in Troubleshooting Laptops, Tablets, and Mobile Devices

06-20-2021, 03:23 PM
Re: HP DV6-2064CA will only power up if its off for about 5 to 10 minutes

>I was trying to remove some solder from the pads because it was a little bumpy but ended up smudging two pads together
tt's not an issue, pins 1-2-3 are connected together, same from pins 5-6-7-8, pin 4 is isolated and should not have continuity to the other pins

> I am unable to remove the solder with the solder wick. I tried multiple times.
Doing so will make it look uglier, as you will be scratching the (green) solder mask more and leaving more bare copper exposed, and solder...

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m1ch43lzm replied to CH341a Serial Mode

in Equipment Usage, Soldering, Techniques, and Reviews

06-17-2021, 06:40 PM
Re: CH341a Serial Mode

Hi, according to CH341A datasheet the chip supports 5v and 3.3v input, and for 5V operation, pin 9 should be connected to a capacitor (page 3 of datasheet) and should not be fed with external power

> will the chip accept the 5v supply and will the TTL signals become 0/5v ?
Yes to both questions

For 3.3v operation according to datasheet 3.3v should be connected also to pin 9 and 28 (page 7 from datasheet), yet on my programmer there's no connection from pin 9 to 28 and it works fine

My programmer looks...

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Last edited by m1ch43lzm; 06-17-2021, 06:55 PM.
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m1ch43lzm replied to Acer E5-571 RTC battery - alternate solder point

in Troubleshooting Laptops, Tablets, and Mobile Devices

06-16-2021, 07:48 PM
Re: Acer E5-571 RTC battery - alternate solder point

Hi, to me, the board looks like it was designed to accept either a rechargeable ML1220 battery, or a standard, non rechargeable CR2032, depending of the components fitted to the board

From the looks of it, D32 and R446 are not fitted (for using a regular CR2032), instead you have D23 installed on your board
Brief explanation of the circuit:
- From +3VLP goes to PR111 (may be fitted with a jumper trace instead), and it becomes +CHGRTC (RTC voltage with charger plugged in)
-+CHGRTC goes from pin 2...

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Last edited by m1ch43lzm; 06-16-2021, 07:56 PM.
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m1ch43lzm replied to HP DV6-2064CA will only power up if its off for about 5 to 10 minutes

in Troubleshooting Laptops, Tablets, and Mobile Devices

06-16-2021, 06:40 PM
Re: HP DV6-2064CA will only power up if its off for about 5 to 10 minutes

>Hi Thanks you for the advice. Attached is the other side of the burnt area where pq42 is. It seems fine? I measured PQ42 and it shows 580 ohms one way, and then open the other as before.
Yes, it looks fine, PQ42 is not shorted

>For cutting the pad, I think I can solder the cap there without any issue by placing it slightly diagonally and butting against the lifted pad. Do you think I should still cut it?

May be possible, just make sure the lifted pad doesn't move...

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m1ch43lzm replied to HP DV6-2064CA will only power up if its off for about 5 to 10 minutes

in Troubleshooting Laptops, Tablets, and Mobile Devices

06-14-2021, 07:54 PM
Re: HP DV6-2064CA will only power up if its off for about 5 to 10 minutes

>Hi there is a small crater where one of the pads should be. The pad seems to be lifted. I think I may be able to connect the capacitor there, but it may be difficult.
Hi, sorry for the delay
No need to reinstall the cap for now, the board should work without PC27 attached, as it's on the +19V line (there are several capacitors in parallel on that line)

My suggestion is to cut the lifted trace with a X-acto/hobby knife, clean with alcohol, then you can use "UV Solder Mask",...

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m1ch43lzm replied to HP DV6-2064CA will only power up if its off for about 5 to 10 minutes

in Troubleshooting Laptops, Tablets, and Mobile Devices

06-02-2021, 07:26 PM
Re: HP DV6-2064CA will only power up if its off for about 5 to 10 minutes

>> Any advice on how to replace the SMD capacitor? Do you think it may have caused irreparable damage?
From the looks of it, there's a short circuit between +VIN (19V) and GND at the area, you can measure resistance across PC29 below

You may remove the cap PC27 with no adverse effect on the board, and clean up the burnt area

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m1ch43lzm started a topic Toshiba Satellite L505 Board 6050A2284301-MB-A02 schematics needed

in Schematic Requests ONLY!

06-02-2021, 06:31 PM
Toshiba Satellite L505 Board 6050A2284301-MB-A02 schematics needed

Hi, i'm looking for Toshiba Satellite L505 schematics (if available, boardview would be nice)

Laptop model: Satellite L505-GS6002
Part Number: PSLU6U-002005
Board: 6050A2284301-MB-A02

Sticker near RAM slots
PN: 1310A2284306
SPS: V000185560

I found this thread [url]https://www.badcaps.net/forum/showthread.php?t=54027&highlight=6050A2284301[/url] but unfortunately links are dead

Thankshttps://Hi, i'm looking for Toshiba ... Laptop model:

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m1ch43lzm replied to Mac Air A1466 2017 661-08140

in Schematic Requests ONLY!

03-12-2019, 10:23 PM
Re: Mac Air A1466 2017 661-08140

Hi, the 820-00165 schematics and board view should help
Found this thread
[url]https://www.badcaps.net/forum/showthread.php?t=54530&highlight=820-00165[/url]

Tip: Always look for a number starting with 820- on Apple boardsRe: Mac Air A1466 2017 661-08140<br ... 820- on Apple

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m1ch43lzm replied to New Members - please post your introductions here

in Announcements & Related News

03-12-2019, 10:18 PM
Re: New Members - please post your introductions here

Hi all
I was looking for a schematic for a Toshiba laptop that was dead (no power at all), and found this forum (and the schematic I needed)
Thank you, now that laptop is working again

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