Re: x453ma motherboard, turns on and off inmediatly
not yet...
iplaypty
Member
Last Activity: 04-05-2025, 04:31 PM
Joined: 08-17-2017
Location: USA
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Re: Need help repairing Old Toshiba Satellite A30
Do you have a bench power supply?
If you do inject some amps there and see what gets hot.
Set the bench power supply to 3v 2A.
Hope it helps...Leave a comment:
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Re: toshiba satellite u940
Thank you!
Now the laptop turn on black screen for some minutes, then it shows me a screen asking for password. The laptop is not mine, customer's laptop, he says he haven't use it for a year and don't remember the password....Leave a comment:
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Re: x453ma motherboard, turns on and off inmediatly
Thank you!...Leave a comment:
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Re: x453ma motherboard, turns on and off inmediatly
Removed PQ8810, now AC_IN_OC# is 3.3v
+3VA_EC is 3.3v
EC_RST is 3.3vLast edited by iplaypty; 03-28-2018, 10:12 AM.Leave a comment:
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Re: x453ma motherboard, turns on and off inmediatly
Found that AC_IN_OC# is 0v
CHG_ACOK_r_10 is 3v.
Changed PR8829 for another 100kohm resistor, no difference.Leave a comment:
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Re: x453ma motherboard, turns on and off inmediatly
Found the boardview, no schematics tho....Leave a comment:
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Re: x453ma motherboard, turns on and off inmediatly
I desoldered PL8101 and was able to get 3V in 3VA_EC and EC_RST....Leave a comment:
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Re: x453ma motherboard, turns on and off inmediatly
I tried to follow the Repair Guide.
The charger is pluged-in, no charging light, now power on, power button has 3.3v, 0v when power button pressed.
steps:
1.Pr8806 AC_BAT_SYS = 19.4v
2 PSL8100 +5VA = 4.98v
3 PSL8101 +3VA = 3.27v
4.R3042 AC_IN_OC# = 0v
5 SL3005 +3VA_EC = 0v
6 D3204 EC_RST = 0v
7.PQ8108 +5VSUS_ON = 0v
8 PQ8108 +3VSUS_ON = 0v
Could it be the ITE IC? how may I properly check it?
ThanksLeave a comment:
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Re: x453ma motherboard, turns on and off inmediatly
This is what I was able to measure...Leave a comment:
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Re: x453ma motherboard, turns on and off inmediatly
What do you mean by "jumpers on motherboard and take out contact to the 3,3v and 5v"?
I haven't been able to find any short, USB ports and HDMI ports look in very good conditions...Leave a comment:
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Re: x453ma motherboard, turns on and off inmediatly
Voltage on pin 11 is 19.4v, stable 19.4v...Leave a comment:
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Re: x453ma motherboard, turns on and off inmediatly
I do not have the schematics. I found a repair guide on internet, but don't know how to use it....Leave a comment:
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x453ma motherboard, turns on and off inmediatly
Hello everyone,
I have this board, x453ma rev 2.0
Power LED turns on and off inmediatly after pressing power button.
I measured all the voltage on UP1589Q, attached image.
How may I know if this IC is ok?
No voltage (3.3v, 5v) on output coils.
Any help or tips on this is very much appreciated.
Thank you... -
Re: hp 14 ac005nx no display
If it's shorted to ground 0 ohm is not OK....Leave a comment:
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Re: Lenovo T420S power problem - help needed, thanks
Found a shorted USB port. Fixed that.
Now I get 3 errors trying to boot, without battery pack. Attacked photo.
0190: Critical low-battery error
Real Time Clock Error - Check date and Time settings
System CMOS Checksum bad_
When the battery is in place it won't boot, the power light turns on and off immediately....Leave a comment:
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Re: Lenovo T420S power problem - help needed, thanks
I put everything together, now it tries to boot but, I get error 0190 (Critical low-battery error) when i try boot.
Doesn't boot with battery pack. Tries to boot without battery pack but i get error 0190.
Does not charge (no charging light)...Leave a comment:
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Re: Lenovo T420S power problem - help needed, thanks
0L
not short....Leave a comment:
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Re: [HP dv6-1304el] LP156WH2-TLQ1 backlight issue
sounds like cable problem.
There is a cheap easy way to fix, but you will not be able to control the light.
check on youtube "electronic repair school backlight"
[URL="https://www.youtube.com/watch?v=zBB1L5F-VZg"]https://www.youtube.com/watch?v=zBB1L5F-VZg[/URL]
I hope it helpsRe: [HP dv6-1304el] LP156WH2-TLQ1 backlight issue
sounds like cable problem.
There is a cheap easy way to fix, but...Leave a comment:
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Re: Lenovo T420S power problem - help needed, thanks
No power on coils L4 and L3...Leave a comment:
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