I was wrong, forget it.
The touchpad problem was from windows.
Thank you anyway (indeed is psplpX but the original bios is corrupted, i do not trust it)
gizaha
Member
Last Activity: 04-11-2025, 07:51 AM
Joined: 03-07-2018
Location: Athens
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Anyone has bios for p70-a-129? The bios i flashed from this thread does not recognize touchpadLeave a comment:
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it work for me also.
I had a toshiba satellite p70-a-129 with DA0BDBMB8F0, waked, no post.
I made all known practices, it wasn't fixed.
I wasn't sure for flashing because i had 3.3v at bios CS# pin and if i read correctly, that means bios ic is turned off.
However flashing (and then clear cmos) fixed the problem....Leave a comment:
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I tested a working psu because i no longer have the faulty one.
The diode is defined as diode in board and not ZD.
However i got 7.8v reverse voltage when injecting 14v through a 10k resistor.
Next time i will have a faulty psu i will compare the values or swap the diode just in caseLeave a comment:
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I checked it as a diode seems ok but
I'm not sure if its zener.
I have a second psu and i will swap diodes just to check that.
In case its not the problem, any other idea?...Leave a comment:
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Dell optiplex PSU problem
Hello. I have problem with Dell psu, outputs are ok but it does not give power ok signal.
It has a secondady board with wt7527s to check inputs. It doesn't give PGO because it doesn't take enough PGI.
It takes PGI from a voltage divider.
I draw a schematic for you to understand.
My first question is why 5v use two transformer pins, while 12v uses only one.
My second question, is pin 2 in transformer weak? After resistor, diode and voltage divider, result is 0.7v instead of 1.2v, so wt7527s does not output PGO.... -
*I mean FAT32 usb stickLeave a comment:
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Dell Latitude 5580 possible bios corruption
Dell latitude 5580, motherboard cdp 80 la-e151p
3 amber 3 white blinks. Dell website sais it's problem "bios recovery" and suggested solution "recovery image not found"
(from here [URL]https://www.dell.com/support/manuals/en-us/latitude-15-5580-laptop/late5580_om_pub/device-status-lights?guid=guid-2bd338a4-db1f-492f-a464-d6d4c8643e7a&lang=en-us[/URL])
I try plugging charger while pressing ctrl+esc, machine turns on, nothing and after 20 seconds it gives 3 amber 3 white blinks again.
Since ssd is replaced and had clean install... -
macbook pro M1 a2338 820-02020 water damage
Small water damage, cleaned it.
Shorted CL002, i removed it carefully with soldering iron, now it has voltage.
5v instant 180ma and then 100ma stable. I didn't found cycling voltage nor shorts in the motherboard.
[B]I don't have pp5v_s2 because uc300 does not get enable pin from u8100 (it gets VIN). pp5v_s2 is not shorted, nor enable pin line.[/B]
PP3V3_S2 OK
PP3V3_S2_UPC OK
PP1V5_VLDOINT_MPMU OK
PP3V3_AON OK
PP1V8_AON OK
PP1V25_S2 OK
PP1V8_S2 OK
PP1V8_S2SW_VDD1 OK
PP3V8_AON OK
u8100 did not have...Last edited by gizaha; 07-15-2022, 07:14 AM. -
Re: DELL 5567 short +3alw at ground at CPU site
He means "cpu SIDE" instead of "site" and +3valw, not +3alw
He gave 3v to +3valw, he didn't kill cpu from that.
Cpu doesn't get 3v, so strange it gets hot.
I cannot proceed to further error correction.Leave a comment:
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Re: Dead 820-01598 - voltages present but no boot
What's PPVCCGT_CPU_PH1? I have 0 volts (without short) but it's working (but warm i think).Leave a comment:
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Re: 820-000928-A Help Identify Location of this Capacitor
Use 820-01814 that look alike, shows that this capacitor has both legs on GND for unknown reason.Leave a comment:
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Re: 820-00928-a Schematic needed
Find solution about this cap! Boardview 820-01814 that look alike shows that this cap (with the other two on the other side of mobo c0402 c0403) have both legs GND (i don't know why).Leave a comment:
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Re: 820-00928-a Schematic needed
This schematic is for 820-00281 that was wrongly renamed 820-00928.brd because there are differences.
Same problem about this cap here [url]https://www.badcaps.net/forum/showthread.php?p=1022772[/url]Re: 820-00928-a Schematic needed<br ...=1022772[/url]Leave a comment:
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Re: 820-000928-A Help Identify Location of this Capacitor
Sometimes a shorted cap will not heat. No alcohol, no freeze spray, no thermal cam will help you. A laser thermometer does not indicate even a 0.1C difference. Motherboard lines will absorve the amperage and there are thinner that the shorted part (so the part will not heat even with high amperage).
In this case i apply some safe voltage as mentioned with 1-2 amperes (never needed more) and check with multimeter all the suspicious parts that connect with the shorted line (using boardview). In the multimeter on...Leave a comment:
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Re: Help Identify Location of this Capacitor
I have exactly the same problem. There are also 2 capacitors on the rear side of this area that are not on boardview and they share the shortage of the line also.
I removed all 3 capacitors and the short is here. So tommorow i will search the rest of board.Last edited by gizaha; 06-06-2022, 08:06 AM.Leave a comment:
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Re: 820-00928-a Schematic needed
Thanks for the files but 820-00928-A is different than the boardview posted here.
You can check here [url]https://logi.wiki/index.php/MacBook_Pro_Pictures#/media/File:00928_verso_composite.jpg[/url]
in the upper right corner, there is an extra capacitor next to c4912.
The specific extra capacitor is shorted on mine.Re: 820-00928-a Schematic needed<br ...site.jpg[/url]Leave a comment:
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Re: hp DA0R23MB6D1 doesnt turn on
Bad news, i soft heated (70C 20sec) u32(chipset) and motherboard turned on.Last edited by gizaha; 05-28-2022, 04:35 AM.Leave a comment:
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hp DA0R23MB6D1 doesnt turn on
The motherboard does not turn on.
I use a wall power meter to check the power consumption.
I plug dc jack without battery, 0.9W, white led turns on.
Push power button, drop to 0.6W, pu3 wakes and it outputs +5vs5 and +3vs5 and it's LDO are ok. Also i stress test the +5vs5 and +3vs5 lines and they withstand many amperes.
PU3 replaced, same results.
HWPG is pulled down from something, i checked all IC that connect with HWPG and they act normally. One by one i injected them their EN signal and they output power.
I tried to inject 3.3v at... -
Re: HP 15-db strange HDD problem LA-G076P
Fixed, please delete this thread.Leave a comment:
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