On my hp 4200, i have killed my 64mb ram trying to add a 48mb ram. do you confirm this 128mb can replace my dead ram on my laserjet hp4200 ?

It should. Just try not to get it killed again :)

Hp 4100 has 4 slots. manual says not to remove lowest slot 1. it's 16 mb. why? this keeps me from putting in full 256 mb.

HP incorporates and stores software need by the printer in a portion of the first memory module. Removing this module or placing in a slot other than 1 will make the printer inoperable in most models.

mpc akai 1000 compatable??

No. The correct item is at listing below, https://www.amazon.com/dp/B00SYQ4VD4

Where is additional memory for an hp laserjet 4200 / 4300 printer installed or where would i get a diagram of this particular printer? thanks!

Mine is an HP 2300. But if you go to Youtube and search "HP 4300 memory" bunch of instructions come up.

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128MB HP LaserJet Printer 100-pin Memory for HP LaserJet 1320 2300 2505 2550 2605 2700 2820 2840 3390 3392 4100 4200 4300 5100 8150 9000 (p/n C9121A, Q9121A, Q7709A)

Product ID: 566400425

Details

Brand
Keystron
Computer memory size
128 MB
Memory speed
100 MHz
Ram memory technology
SDRAM
Special features
Lightweight

⚡Faster print jobs

💾128MB SDRAM boost

🪶Ultra-lightweight 1oz

NT$3666

Duties & taxes included

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Sold byAmazon TaiwanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚀 Upgrade your print game—because slow printers are so last decade!

LIGHT AS A FEATHER - Weighing just 1 ounce, it adds power without bulk—keep your workspace sleek and efficient.
MEMORY UPGRADE MAGIC - 128MB SDRAM turbocharges your HP LaserJet for seamless multitasking and complex print jobs.
SPEED THAT SAVES TIME - Slash wait times with faster processing—perfect for high-volume professionals who demand efficiency.
PLUG PLAY SIMPLICITY - Effortless installation with clear HP instructions—no tech headaches, just instant performance.
UNIVERSAL COMPATIBILITY - Works flawlessly across 15+ HP LaserJet models, making it the smart upgrade for your office arsenal.

This 128MB SDRAM memory module (100-pin) is a lightweight, cost-effective upgrade for a wide range of HP LaserJet printers, dramatically improving print speed and handling of complex documents. Easy to install and compatible with over 15 HP models, it transforms your printer into a productivity powerhouse without breaking the bank.

Specifications

ASIN	B00FAY6SVQ
Additional Features	Lightweight
Brand	Keystron
Computer memory size	128 MB
Customer Reviews	4.4 out of 5 stars 41 Reviews
Item Weight	1 Ounces
Mfr Part Number	4328385936
Model Number	C9121A, Q9121A, Q7709A
Number of Pins	100
Number of pins	100
RAM Memory Technology	SDRAM
RAM Size	128 MB
Ram memory technology	SDRAM
Special features	Lightweight
UPC	609728998219

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